Holidays and Observances
Alphabetical Listing of N Holidays
Below, you can find a Holidays and Observances Alphabetical Listing of US Holidays and World Holidays and Observances that start with N. We are still adding names to the list, so more information will be coming.
After we complete the summary pages on the site, we will start working on a detailed page(s) for each Holidays and Observance. Once a page is completed for each Holiday or Observance, it will be linked up below, as well as it's related Daily Holidays page. (that should keep us busy for the next 20 years or so!!)
Search for Holidays Alphabetically:
A, B, C, D, E, F, G, H, I, J, K, L, M, N, N-Pg2 O, P, Q, R, S, T, U, V, W, X-Y-Z
N
- NAACP Day - February 12
- Nail Day - May 5
- Name Your PC Day - November 20
- Name Your Poison Day - June 8
- Name Yourself Day - April 9
- Namesake Day - March 3, 2024 (First Sunday in March)
- Nametag Day - March 7, 2024 (Thursday of First Full Week in March)
- NanoDays - March 30 - April 7, 2024
- NAOSH Week - May 5-11, 2024 (First Full Week in May) NAOSH = North American Occupational Safety and Health Week
- Nap Day - July 20
- NASCAR Day - May 17, 2024 (Third Friday in May)
- Nathan Bedord Forrest Day (local observance in Tennessee) - July 13
- National #2 Pencil Day - August 17
- National 12 Hour Fresh Breath Day - December 12
- National 401 (k) Day - September 6, 2024 (First Friday after Labor Day)
- National Aardvark Week - Second Week of March
- National Aborigines and Islanders Day Observance Committee Week (NAIDOC Week) - In Australia - July 7-14, 2024 (8 Days Starting the First Sunday in July)
- National Absinthe Day - March 5
- National Absurdity Day - November 20
- National Acadian Day (Canada) - August 15
- National Accordion Awareness Month - June
- National Acorn Squash Day - September 7
- National Activity Professionals Day - January 26, 2024 (Fourth Friday in January)
- National Activity Professionals Week - January 21-27, 2024 (Fourth Full Week in January)
- National Actors Day - September 8
- National Adopt a Greyhound Month - April
- National Adopt a Shelter Pet Day - April 30
- National Adoption Day - November 23, 2024 (Saturday before Thanksgiving)
- National Adoption Month - November
- National Adoption Week - November 24-30, 2024 (Week of US Thanksgiving)
- National Adult Day Services Week - September 15-21, 2024 (Third week of September)
- National Aesthetician Day - October 15
- National Aesthetician Month - October
- National African American Read-In - February
- National African American Women's Fitness Month - April
- National African Violet Week - April 21-28, 2024
- National Agriculture Day - March 19, 2024 (Falls During National Agriculture Week Each Year)
- National Agriculture Week - March 17-23, 2024 (Week in March that has March 21st)
- National AIDS Awareness Month - October
- National Air Traffic Control Day - July 6
- National Airborne Day - August 16
- National Alcohol & Drug Addiction Recovery Month - September
- National Alcohol & Other Drug-Related Birth Defects Week - May 5-11, 2024 (First Full Week in May)
- National Alcohol Screening Day - April 11, 2024 (Thursday of First Full Week in April)
- National Alfred Hitchcock Day - March 12
- National All is Ours Day - April 8
- National All or Nothing Day - July 26
- National Allergy and Asthma Awareness Month - May
- National Allied Health Week - November 3-9, 2024 (First Full Week of November)
- National Almond Buttercrunch Day - June 29
- National Almond Day - February 16
- National Alzheimer's Disease Awareness Month - November
- National Amaretto Day - April 19
- National Ambrosia Day - December 12
- National American Indian Heritage Month - November
- National American Teddy Bear Day - November 14
- National Americana Month - September
- National Ampersand Day - September 8
- National And Global Youth Service Days - April 26-28, 2024 (Last Weekend in April)
- National Angel Food Cake Day - October 10
- National Animal Advocacy Day - April 30
- National Animal Control Appreciation Week - April 14-20, 2024 (Second Full Week of April)
- National Animal Control Officer Appreciation Week - April 14-20, 2024
- National Animal Disaster Preparedness Day - May 11, 2024 (Second Saturday in May)
- National Animal Poison Prevention Week - March 17-23 2024 (Third Full Week in March)
- National Animal Rights Day - June 2, 2024 (First Sunday in June)
- National Animal Safety and Protection Month - October
- National Animal Shelter and Rescue Appreciation Week - November 3-9, 2024 (First Full Week of November)
- National Anisette Day - July 2
- National Anonymous Giving Week - March 17-23, 2024 (Third Full Week of March)
- National Answer Your Cat's Question Day - January 22
- National Anthem Day - March 3
- National Anti-Frizz Month - August
- National Ants on a Log - September 10, 2024 (Second Tuesday in September)
- National Anxiety & Depression Awareness Week - May 5-11, 2024 (First Full Week in May)
- National Anxiety Disorders Screening Day - May 1, 2024 (First Wednesday in May)
- National Anxiety Month - April
- National Aperitif Day - May 16, 2024 (Third Thursday in May)
- National Aphasia Awareness Month - June
- National Aplastic Anemia & MDS Awareness Week - March 1-6
- National App Day - December 11
- National Apple Betty Day - October 5
- National Apple Cider Day - November 18
- National Apple Dumpling Day - September 17
- National Apple Month - October
- National Apple Pie Day - December 3
- National Apple Pie Day - May 13
- National Apple Strudel Day - June 17
- National Apple Turnover Day - July 5
- National Apple Week - Now observed during Apple Month in October
- National Applejack Month - October
- National Applesauce Cake Day - June 6
- National Apricot Day - January 9
- National Archery Day - May 11, 2024 (Second Saturday in May)
- National Artichoke Hearts Day - March 16
- National Arts and Humanities Month - October
- National Asian and Pacific Islander HIV/AIDS Awareness Day - May 19
- National Ask An Atheist Day - April 18, 2024 (Third Thursday of April); Also September 19, 2024 (Third Thursday of September)
- National ASL Day (American Sign Language) - April 15
- National Asparagus Month - May
- National Assisted Living Week - September 8-14, 2024
- National Atheist Day - April 1
- National Athletic Training Month - March
- National Atrial Fibrillation Awareness Month - September
- National Attend Your Grandchild's Birthday Day - September 29
- National Attention Deficit Disorder Awareness Day - September 18
- National Auctioneers Day - May 4, 2024 (First Saturday in May)
- National Auctioneers Week - April 28 - May 4, 2024
- National Audiology Awareness Month - October
- National Authors' Day - November 1
- National Autism Awareness Month - April
- National Automotive Service Professionals Day - June 12
- National Automotive Service Professional Week - June 9-15, 2024 (Week with June 12th in it)
- National Autonomous Vehicle Day - May 31
- National Aviation Day - August 19
- National Aviation Week - August 15-21 (Always during the week of Orville Wright's Birthday on August 19)
- National Avocado Day - July 31
- National Awkward Moments Day - March 18
- National Baby Food Week - July 17-20, 2024
- National Babysitters Day - May 11, 2024 (Saturday before Mother's Day)
- National Back to Church Sunday - September 15, 2024 (Third Sunday in September)
- National Back to School Month - August
- National Backcountry Ski Day March 4
- National Backyard Games Week - May 19-25, 2024 (Week before Memorial Day)
- National Bacon Day - February 26
- National Bacon Lover's Day - August 20
- National Bad Day - August 22
- National Badge Ribbon Day - August 18
- National Badger Day - October 6
- National Bagels and Lox Day - February 9
- National Bagel Day - January 15
- National Bake and Decorate Month - October
- National Bake Week - April 1-7, 2024 (Begins First Monday of April)
- National Baked Alaska Day - February 1
- National Baked Bean Month - July
- National Baked Ham with Pineapple Day - March 31, 2024 - (Same day as Easter)
- National Baked Scallops Day - March 12
- National Bakery Day - September 25
- National Ballroom Dance Week - TBD
- National Banana Bread Day - February 23
- National Banana Cream Pie Day - March 2
- National Banana Split Day - August 25, 2024
- National Bao Day (Steamed Buns) - August 22
- National Barbeque Day - July 4
- National Barbecued Spareribs Day - July 4
- National Barbeque Month - May
- National Barefoot Week - First Week in June
- National Bargain Hunting Week - August 5-9, 2024 (First Monday-Friday Week)
- National Barrier Awareness Day - May 7
- National Bathroom Reading Month - June
- National Battery Day - February 18
- National Bavarian Cream Pie Day - November 27
- National Bavarian Crepes Day - March 22
- National Be a Millionaire Day - May 20
- National Be Heard Day - March 7
- National Be Kind to Lawyers Day - April 9, 2024 (Second Tuesday in April)
- National Be Nasty Day - March 8
- National Be On-Purpose Month - January
- National Be Someone Day - July 21
- National Beach Day - August 30
- National Beach Party Day - August 7
- National Bean Counter Day - April 16
- National Bean Day - TBD
- National Bed Check Month - September
- National Beef Tallow Day - July 13
- National Beer Day - April 7
- National Beer Lover's Day - September 7
- National Best Friends Day - August 15
- National Better Breakfast Day - September 26
- National Beverage Day - May 6
- National Bible Sunday - January 28, 2024 (Fourth Sunday in January)
- National Bible Week - November 24 - December 1, 2024 (Sunday to Sunday of the Week of US Thanksgiving)
- National Bicarbonate of Soda Day (Baking Soda) - December 30
- National Bicycle Safety Month - May
- National Big Wig Day - January 26, 2024 (Last Friday in January)
- National Bike Month - May
- National Bike to Work Day - May 17, 2024 (Third Friday in May)
- National Bike to Work Week - May 13-19, 2024 (Third M-F Week in May)
- National Bike Week - Third Week of May
- National Bill Cosby Sweater Day - January 20
- National Bingo Day - June 27
- National Biodiesel Day - March 18
- National Bird Day - January 5
- National Bird Feeding Month - February
- National Birding Day - April 6, 2024 (First Saturday of April)
- National Birth Defects Prevention Month - January
- National Biscotti Day - September 29
- National Biscuit and Gravy Week - September 8-14, 2024 (Second Week of September)
- National Biscuit Day - May 29
- National Biscuit Month - September
- National Bison Month - July
- National Bittersweet Chocolate with Almonds Day - November 7
- National Black Bear Day - June 1, 2024 (First Saturday in June)
- National Black Cat Appreciation Day - August 17
- National Black Cat Day - November 17
- National Black Cat Day (U.K.) - October 27
- National Black Cow Day - June 10
- National Black Dog Day - October 1
- National Black Family Month - July
- National Black Forest Cake Day - March 28
- National Black History Month - February
- National Black HIV/AIDS Awareness Day - February 7
- National Black Women in Jazz and the Arts Day - March 1
- National Bladder Health Awareness Month - November
- National Blah Buster Month - February
- National Block It Out Day - November 6, 2024 (First Wednesday in November)
- National Blond Brownie Day - January 22
- National Blood Donor Month - January
- National Bloody Mary Day - January 1
- National Blow Bagpipes Day - November 19
- National BLT Sandwich Month - April
- National Blue Jeans Day - December 5
- National Blue Ribbon Week - April 7-13, 2024 (First Full Week of April)
- National Blueberries Month - July
- National Blueberry Cheesecake Day - May 26
- National Blueberry Muffin Day - July 11
- National Blueberry Pancake Day - January 28
- National Blueberry Pie Day - April 28
- National Blueberry Popover Day - March 10
- National Blueberry Popsicle Day - September 2
- National Blueberry Popsicle Month - September
- National Bluebird of Happiness Day - September 24
- National Bobblehead Day - January 7
- National Body Language Day - October 4, 2024 (First Friday)
- National Body Piercing Week - June 23-28, 2024
- National Bologna Day - October 24
- National Bomb Pop Day - June 27, 2024 (Last Thursday in June)
- Natural Booch Day - January 15
- National Book Awards Week - November 7-13, 2024
- National Book Blitz Month - January
- National Book It Day - October 1
- National Book Lovers Day - August 9 and November 2, 2024 (First Saturday in November)
- National Book Month - October
- National Bookmobile Day - April 17, 2024 (Third Wednesday of April)
- National Bootleggers Day - January 17
- National Boss Day - October 16, 2024 (October 16 annually except if it falls on a weekend, then nearest weekday)
- National Boss/Employee Exchange Day - September 9, 2024 (First Monday after Labor Day)
- National Boston Cream Pie Day - October 23
- National Bouillabaisse Day - December 14
- National Bourbon Day - June 14
- National Bourbon Heritage Month - September
- National Bow Tie Day - August 28
- National Bowling Day - August 10, 2024 (Second Saturday in August)
- National Boyfriend Day - October 3
- National Braille Literacy Month - January
- National Brandied Fruit Day - October 20
- National Bratwurst Day - August 16
- National Brave Day - September 27, 2024 (Fourth Friday in September)
- National Breadstix Day - October 25, 2024 (Last Friday in October)
- National Break Up With Your Carrier Day - February 13
- National Breakfast Month - September
- National Breast Cancer Awareness Month - October
- National Breast Implant Awareness Month - March
- National Breastfeeding Month - August
- National Bridal Sale Day - July 20, 2024 (Third Saturday in July)
- National Bring Your Teddy Bear to Work & School Day - October 9, 2024 (Second Wednesday in October)
- National Brisket Day - May 28
- National Brown-Bag-It Day - May 25
- National Brownies at Brunch Month - August
- National Brush Day - November 1
- National Bubba Day - June 2
- National Bubble Gum Week - March 10-16, 2024 (Second Full Week of March)
- National Bubble Tea Day - April 30
- National Bubble Week - March 17-23, 2024 (First Week of Spring)
- National Bubbly Day - June 1, 2024 (First Saturday in June)
- National Buffalo Chicken Wings Days - August 31 - September 1, 2024 (Always Labor Day Weekend)
- National Buffet Day - January 2
- National Bulk Foods Week - Third Week of October
- National Bulldogs are Beautiful Day - April 28
- National Bullying Prevention Awareness Month - October
- National Bundt Day - November 15
- National Bunsen Burner Day - March 31
- National Burglary Prevention Month - June
- National Burrito Day - April 4, 2024 (First Thursday in April)
- National Business Etiquette Week - June 2-8, 2024 (First Full Week in June)
- National Business Women's Week - October 20-26, 2024 (Third Full Week of October)
- National Buttercrunch Day - January 20
- National Buttermilk Biscuit Day - May 14
- National Butterscotch Brownie Day - May 9
- National Butterscotch Pudding Day - September 19
- National Button Day - November 16
- National Button Week - March 17-23, 2024 (Third Full Week in March)
- National Buy a Musical Instrument Day - May 22
- National Cabbage Day - February 17
- National CAD Day - August 2
- National Caesar Salad Day - July 4
- National Cafe Au Lait Day - February 17
- National Caffeine Awareness Month - March
- National Cake Day - November 26
- National Cake Decorating Day - October 10
- National Call-In Day for Health Reform - October 20
- National Call in Single Day - February 14
- National Calzone Day - November 1
- National Camera Day - June 29
- National Camp Day - November 19
- National Camping Month - June
- National Camping Week - June 23-29, 2024 (Last Full Week in June)
- National Cancer Prevention Month - February
- National Cancer Survivors Day - June 2, 2024 (First Sunday in June)
- National Candied Orange Peel Day - May 4
- National Candle Month - November
- National Candy Cane Day - December 26
- National Candy Corn Day - October 30
- National Candy Day - November 4
- National Candy Month - January
- National Candy Month - June
- National Canine Lymphoma Awareness Day - November 7
- National Canned Luncheon Meat Week - First Week of July
- National Canning Day - October 23
- National Canning Month - August
- National Canoe Day - June 26
- National Cappuccino Day - November 8
- National Caramel Apple Day - October 31
- National Caramel Custard Day - October 3
- National Caramel Day - April 5
- National Caramel Month - October
- National Caramel Popcorn Day - April 6
- National Card and Letter Writing Month - April
- National Card Playing Day - December 28
- National Cardiac Rehabilitation Week - February 11-17, 2024 (Second Full Week of February)
- National Care About Your Indoor Air Month - February
- National Career Nursing Assistants Day - June 13, 2024 (First Day of National Nursing Assistants Week)
- National Caregivers Day - February 16, 2024 (Third Friday in February) and September 15
- National Caribbean-American Heritage Month - June
- National Caribbean-American HIV/AIDS Awareness Day - June 8
- National Carnation Day - January 29
- National Carrot Cake Day - February 3
- National Carrot Day - February 3
- National Carry a Tune Week - October 6-12, 2024 (Always has 7th in it)
- National Cartoonists Against Crime Day - October 25
- National Case Management Week - October 13-19, 2024 (Second Full Week of October)
- National Cash Back Day - November 7, 2024 (First Thursday in November)
- National Cashew Day - November 23
- National Cassoulet Day - January 9
- National Cat Day - October 29
- National Cat Health Month - February
- National Cat Week - November 3-9, 2024 (First Full Week of November)
- National Catch and Release Day - April 13, 2024 (Second Saturday in April)
- National Catfish Day - June 25
- National Catfish Month - August
- National Catholic Sisters Week - March 8-14
- National Caviar Day - July 18
- National CBD Day - August 8
- National CBD Month - January
- National Ceiling Fan Day - September 18
- National Celebrate Your Marriage Day - June 29, 2024 (Last Saturday in June)
- National Celery Month - March
- National Celiac Awareness Day - September 13
- National Celiac Disease Awareness Month - May
- National Centenarian's Day - September 22
- National Cereal Day - March 7
- National Cerebral Palsy Awareness Month - March
- National Cerebral Palsy Day - March 25
- National Certified Nurses Day - March 19
- National Certified Registered Nurse Anesthetists Week - January 21-27, 2024 (Last Full Week in January)
- National Ceviche Day - June 28
- National Chai Day - September 21
- National Champagne Day - December 31
- National Championship Chuckwagon Races - August 29 - September 1, 2024 (Clinton, Arkansas) (Thursday - Sunday of Labor Day Weekend)
- National Chaos Never Dies Day - November 9
- National Character Counts Week - October 20-26, 2024 (Third Full Week of October)
- National Charter Schools Week - May 13-17, 2024
- National Cheap flight Day - August 23
- National Checkers Day - September 23
- National Cheddar Day - February 13
- National Cheddar Fries Day - April 20
- National Cheer Coach Day - June 1, 2024 (First Saturday in June)
- National Cheer Up The Lonely Day - July 11
- National Cheerleading Safety Month - March
- National Cheerleading Week - March 1-7
- National Cheese Curd Day - October 15
- National Cheese Day - June 4
- National Cheese Doodle Day - March 5
- National Cheese Fondue Day - April 11
- National Cheese Lover's Day - January 20
- National Cheese Pizza Day - September 5
- National Cheese Souffle Day - May 18
- National Cheese Toast Day - September 15
- National Cheeseball Day - April 17
- National Cheeseburger Day - September 18
- National Cheesecake Day - July 30
- National Cheesemaker's Day - June 18
- National Cheesesteak Day - March 24
- National Cheesy Socks Day - January 21
- National Chef's Appreciation Week - September 8-14, 2024 (Third Week in August)
- National Chemistry Week - October 20-26, 2024 (Third Full Week of October)
- National Cherish an Antique Day - April 9
- National Cherries Jubilee Day - September 24
- National Cherry Blossom Festival - March 20 - April 14, 2024 (Washington D.C.)
- National Cherry Cheesecake Day - April 23
- National Cherry Cobbler Day - May 17
- National Cherry Dessert Day - May 26
- National Cherry Month - February
- National Cherry Pie Day - February 20
- National Cherry Popover Day - September 1
- National Cherry Popsicle Day - August 26
- National Cherry Tart Day - June 18
- National Cherry Turnover Day - August 28
- National Chess Day - October 12, 2024 (Second Saturday in October) and October 13
- National Chestnut Week - October 13-19, 2024 (Second Full Week of October)
- National Chia Day - March 23
- National Chicken and Waffles Day - July 30
- National Chicken Cacciatore Day - October 15
- National Chicken Dance Day - May 14
- National Chicken Finger Day - July 27
- National Chicken Lady Day - November 4
- National Chicken Little Awareness Day - April 9
- National Chicken Month - September
- National Chicken Wing Day - July 29
- National Child Abuse Prevention Month - April
- National Child Awareness Month - September
- National Child Centered Divorce Awareness Month - January and July
- National Child Free Day - August 1
- National Child Mental Health Month - November
- National Child Safety Council Day - November 9
- National Childhood Injury Prevention Month - September
- National Childhood Injury Prevention Week - September 1-7
- National Childhood Obesity Awareness Month - September
- National Children's Book Week - May 6-12, 2024 (First Full Week starting on a Monday) and November 4-10, 2024
- National Children's Craft Day - March 14
- National Children's Day - June 9, 2024 (Second Sunday in June)
- National Children's Day - October 8
- National Children's Dental Health Month - February
- National Children's Mental Health Awareness Day - May 9, 2024 (Thursday of the First Full Week in May)
- National Children's Mental Health Week - February 4-10, 2024 and May 5-11, 2024 (First Full Week in February and May)
- National Child's Day - June 2, 2024 (First Sunday in June)
- National Chili Day - February 29, 2024 (Last Thursday of February)
- National Chili Dog Day - July 25, 2024 (Last Thursday in July)
- National Chili Month - October
- National Chili Week - First Week of October
- National Chimney Safety Week - September 29 - October 5, 2024 (Week before Fire Prevention Week)
- National Chip and Dip Day - March 23
- National Chiropractic Health Month - October
- National Chocolate Brownie Day - December 8
- National Chocolate Caramel Day - March 19
- National Chocolate Chip Day - May 15 and August 4
- National Chocolate Covered Anything Day - December 16
- National Chocolate Covered Cashews Truffle Day - April 21
- National Chocolate Covered Cherry Day - January 3
- National Chocolate Covered Insects Day - October 14
- National Chocolate Covered Nuts Day - February 24
- National Chocolate Covered Raisin Day - March 24
- National Chocolate Cupcake Day - October 18
- National Chocolate Custard Day - May 3
- National Chocolate Custard Month - May
- National Chocolate Day - October 28, December 28 and December 29
- National Chocolate Eclair Day - June 22
- National Chocolate Fondue Day - February 5
- National Chocolate Ice Cream Day - June 7
- National Chocolate Macaroon Day - June 3
- National Chocolate Milk Day - September 27
- National Chocolate Milkshake Day - September 12
- National Chocolate Mint Day - February 19
- National Chocolate Mousse Day - April 3
- National Chocolate Parfait Day - May 1
- National Chocolate Pecan Pie Day - August 20
- National Chocolate Pudding Day - June 26
- National Chocolate Souffle Day - February 28
- National Chocolate Wafer Day - July 3
- National Cholesterol Education Month - September
- National Chopsticks Day - February 6
- National Christmas Lights Day - December 1
- National Christmas Tree Day - December 8
- National Chronic Fatigue Syndrome Awareness Month - March
- National Cinnamon Crescent Day - April 10
- National Cinnamon Day - November 1
- National Cinnamon Raisin Bread Day - September 16
- National Clam Chowder Day - February 25
- National Clams on the Half Shell Day - March 31
- National Clay Week (Pottery) - June 9-15, 2024 (Second Full Week of June)
- National Clean Off Your Desk Day - January 8, 2024 (Second Monday in January)
- National Clean Out Your Closet Week - March 17-23, 2024 (Third Full Week of March)
- National Clean Out Your Garage Day - September 7, 2024 (Saturday After Labor Day)
- National Clean Out Your Inbox Week - January 22-26, 2024
- National Clean Out Your Refrigerator Day - November 15
- National Clean Up Day - September 21, 2024 (Third Saturday in September)
- National Clean Up Your Computer Month - January
- National Clean Up Your IRS Act Month - March
- National Clean Your Virtual Desktop Day - October 21, 2024 (Third Monday in October)
- National Cleaning Week - March 24-30, 2024 (Last Week of March)
- National Cleanse Your Skin Week - August 1-7
- National Cleft & Craniofacial Awareness & Prevention Month - July
- National Clown Day - August 3, 2024 (Saturday that falls on Clown Week August 1-7)
- National Coaches Day - October 6
- National Cocktail Day - March 24
- National Cocoa Day - December 13
- National Coconut Cream Pie Day - May 8
- National Codependency Awareness Month - January
- National Coffee Break Day - January 20
- National Coffee Day - September 29
- National Coffee Ice Cream Day - September 6
- National Coffee Milkshake Day - July 26
- National Cognac Day - June 4
- National Coin Week - April 21-27, 2024 (Fourth Week in April)
- National Cold Cuts Day - March 3
- National Collect Rocks Day - September 16
- National College Colors Day - August 30, 2024 (First Friday of College School Year)
- National Collegiate Alcohol Awareness Week - October 13-19, 2024
- National Color Day - October 22
- National Color Therapy Month - March
- National Colorectal Cancer Awareness Month - March
- National Coloring Book Day - August 2
- National Coloring Day - September 14
- National Columnists Day - April 18
- National Columnists Day - June 25, 2024 (Fourth Tuesday in June)
- National Comfort Month - May
- National Coming Out Day - October 11
- National Common Courtesy Day - March 21
- National Communicate with Your Kids Day - December 5
- National Community Action Month - May
- National Commute With Your Baby Day - December 5
- National Commuter Challenge - June 2-8, 2024 (Week Long Event During the Canadian Environment Week)
- National Compliment Day - January 24
- National Composites Week - August 26-30, 2024
- National Concert Day - May 7, 2024 (First Tuesday in May)
- National Concussion Awareness Day - September 20, 2024 (Third Friday in September)
- National Condom Awareness Day - February 14
- National Condom Month - February
- National Condom Week - February 14-21
- National Congenital Cytomegalovirus Awareness Month - June
- National Consignment Day - October 7, 2024 (First Monday in October
- National Consumer Protection Week - March 3-9, 2024 (First Full Week of March)
- National Consumers Week - Fourth Week of October
- National Cook a Sweet Potato Day - February 22
- National Cook for Your Pets Day - November 1
- National Cookbook Month - October
- National Cookie Day - December 4
- National Cookie Exchange Day - December 22
- National Cookie Month - October
- National Cooking Day - September 25
- National Cooler Day - May 24, 2024 (Friday before Memorial Day)
- National Coq Au Vin Day - May 29
- National Coquilles St. Jacques Day - May 16
- National Coquito Day - December 21
- National Cordon Bleu Day - April 4
- National Cordova Ice Worm Day - February 3
- National Corn Chip Day - January 29
- National Corn Fritters Day - July 16
- National Corndog Day - March 16, 2024
- National Corned Beef Hash Day - September 27
- National Correctional Officer's Week - May 5-11, 2024 (First Full Week in May)
- National Cosmopolitan Day - May 7
- National Costume Swap Day - October 12, 2024 (Second Saturday in October)
- National Cotton Candy Day - July 31 and December 7
- National Countdown Day - March 21
- National Country Music Day - July 4
- National Coupon Month - September
- National Courtesy Month - September
- National Cowboy Poetry Gathering Week - January 29 - February 3, 2024
- National Cowgirl Day - August 31, 2024 (Saturday of Labor Day Weekend)
- National CPR and AED Awareness Week - June 1-7
- National Crab Rangoon Day - February 13
- National Crabmeat Day - March 9
- National Craft For Your Local Shelters Day - July 21
- National Craft Jerky Day - November 27
- National Craft Month - March
- National Craft Spirits Week - June 16-22, 2024 (Third Week of June)
- National Cranberry Relish Day - November 22
- National Crayola Day - April 25
- National Crayon Collection Month - August
- National Crazy Day - October 24
- National Cream Filled Chocolates Day - February 14
- National Cream Filled Donut Day - September 14
- National Cream Puff Day - January 2
- National Creamsicle Day - August 14
- National Create a Vacuum Day - February 4
- National Creativity Day - May 30
- National Creme Brulee Day - July 27
- National Creme de Menthe Day - September 15
- National Crepes Suzette Day - May 6
- National Crime Prevention Month - October
- National Crime Prevention Week - February 4-10, 2024 (First Full Week of February)
- National Crime Victims' Rights Week - April 21-27, 2024
- National Critical Illness Awareness Month - October
- National Croc Day - October 23
- National Crochet Month - March
- National Croissant Day - January 30
- National Crowd Feed Day - January 15, 2024 (Same Day as Martin Luther King Day, Third Monday in January)
- National Crown Roast of Pork Day - March 7
- National Crunchy Taco Day - March 21
- National Cubicle Day - April 28
- National Culinarians Day - July 25
- National Culinary Arts Month - July
- National Cupcake Day - December 15
- National Cupcake Day (Canada) - February 26, 2024 (Last Monday in February)
- National Curves Day - October 12, 2024 (Second Saturday in October)
- National Custodial Workers Day - October 2
- National Customized Wheel and Tire Day - February 26
- National Cut the Cord Day - February 9
- National Cut Up Your Credit Card Day - October 16
- National Cut Your Energy Costs Day - January 10
- National Cyber Security Awareness Month - October
- National Cystic Fibrosis Awareness Month - May
- National Dadgum That's Good Day - March 1
- National Daiquiri Day - July 21, 2024 (Third Sunday in July)
- National Dairy Month - June
- National Dance Day - February 24
- National Dance Day - April 27, 2024 (Fourth Saturday in April)
- National Dance Day - September 21, 2024 (Third Saturday in September)
- National Dance the Waltz Day - March 4
- National Dance Week - April 19-28, 2024
- National Dandelion Day - April 5
- National D.A.R.E. Day - April 18, 2024 (Third Thursday in April)
- National Dark Sky Week - Third Week in April
- National Data Privacy Day - January 28
- National Date Nut Bread Day - September 8 and December 22
- National Date Week (Fruit) - February 11-20
- National Date Your Mate Month - May
- National Day of Action Against Bullying and Violence - March 15, 2024
- National Day of Action on Syringe Exchange - March 21
- National Day of Action (Peace Corps) - (2024 TBD)
- National Day of Animal Rights - December 10
- National Day of Civic Hacking - September 12
- National Day of Encouragement - September 12
- National Day of Honor - March 19
- National Day of Hope - April 3, 2024 (First Wednesday of April)
- National Day of Lament - July 27, 2024 (Last Saturday in July)
- National Day of Listening - November 29, 2024 (Day After Thanksgiving)
- National Day of Mourning - November 28, 2024 (Thanksgiving Day)
- National Day of Prayer - May 2, 2024 (First Thursday in May)
- National Day of Prayer and Remembrance for the Victims of Hurricane Katrina - September 16
- National Day of Prayer for Law Enforcement Officers - June 15
- National Day of Prayer for Victims of Hurricane Harvey - September 3
- National Day of Puppetry - April 27, 2024 (Fourth Saturday in April)
- National Day of Reason - May 2, 2024 (First Thursday in May) - Set up in 2003 by Humanists/Atheists on the same day as the National Day of Prayer for a secular alternative
- National Day of Remembrance for Aborted Children - September 14, 2024 (Second Saturday in September)
- National Day of Service - January 15, 2024 (Third Monday in January)
- National Day of Service and Remembrance - September 11
- National Day of Silence - TBD
- National Day of Solidarity With Muslim, Arab, and South Asian Immigrants - February 20
- National Day of the Cowboy - July 27, 2024 (Fourth Saturday in July)
- National Day of the Deployed - October 26
- National Day of the Gong - June 21
- National Day of the Horse - December 13
- National Day of Unplugging - March 1-2, 2024 (First Friday/Saturday of March) and March 6
- National Day on Writing - October 20
- National Day to Prevent Teen & Unplanned Pregnancy - May 1, 2024
- National Daylight Appreciation Day - June 20, 2024 (First Day of Summer)
- National Days of Action (Peace Corp) - (2024 TBD)
- National Days of Prayer and Remembrance - September 13-15, 2024 (Friday - Sunday closest to 9/11)
- National Deaf Dog Awareness Week - September 22-28, 2024 (Last Full Week in September)
- National (Deaf) Interpreter Day - May 1, 2024 (First Wednesday in May)
- National Deal Week - November 27 - December 3, 2024 (Week Begins on the Wednesday before Thanksgiving)
- National Death Busters Day - May 24, 2024 (Friday before Memorial Day)
- National Decorating Month - April
- National Deep Dish Pizza Day - April 5
- National Deep Fried Clams Day - July 1 and November 1
- National Defense Transportation Day - May 17, 2024 (Third Friday in May)
- National Defy Superstition Day - September 13
- National Dental Assistants Recognition Week - March 3-9, 2024 (First Full Week in March)
- National Dental Hygiene Month - October
- National Dental Hygienist Week - April 4-10
- National Depression Education and Awareness Month - October
- National Depression Screening Day - October 10, 2024 (Second Thursday in October)
- National Dessert Day - October 14 and October 10, 2024 (Second Thursday of October)
- National Dessert Month - October
- National Develop Alternative Vices Day - February 9
- National Developmental Disabilities Awareness Month - March
- National Devil Dog Cakes Day - April 27
- National Deviled Egg Day - November 2
- National Devil's Food Cake Day - May 19
- National Diabetes Awareness Month - November
- National Diabetes Education Week - November 3-9, 2024 (First Full Week of November)
- National Diatomaceous Earth Day - August 31
- National Dice Day - December 4
- National Dictionary Day - October 16
- National Ding-A-Ling Day - December 12
- National Disability Employment Awareness Month - October
- National Disaster Preparedness Month - September
- National Disc Golf Day - August 3, 2024 (First Saturday in July)
- National Disc Jockey Day - January 20
- National Dissertation Day - April 26
- National Distracted Driving Awareness Month - April and October
- National Dive Bar Day - April 12, 2024 (Second Friday in April)
- National Diversity Day - October 4, 2024 (First Friday in October)
- National DIY Day - April 6, 2024 (First Saturday in April)
- National DJ Month - June
- National DNA, Genomics and Stem Cell Education and Awareness Month - September
- National Doctors Day - March 30
- National Dog Biscuit Day - February 23
- National Dog Bite Prevention Week - April 7-13, 2024
- National Dog Day - August 26
- National Dog Fighting Awareness Day - April 8
- National Dog House Repairs Month - July
- National Dog Mom's Day - May 11, 2024 (Saturday before Mothers Day)
- National Dog Party Day - June 21
- National Dog Walker Appreciation Day - September 6, 2024 (Friday after Labor Day)
- National Dog Week - September 22-28, 2024 (Last Full Week of September)
- National Doll Day - August 4, 2024 (First Sunday in August)
- National Dollar Day - August 8
- National Dolphin Day - April 14
- National Domestic Violence Awareness Month - October
- National Donate Life (Blue and Green) Day - April 12, 2024
- National Donate Life Month - April
- National Donor Day - February 14
- National Donor Sabbath - November 15-17, 2024 (Two Weekends Before Thanksgiving)
- National Don't Put All Your Eggs in One Omelet Day - July 9
- National Donut Day - June 7, 2024 (First Friday in June), and November 5
- National Doodle Day - September 13, 2024
- National Doorbell Day - October 31
- National Double Cheeseburger Day - September 15
- National Down Syndrome Awareness Month - October
- National Download Day - December 28
- National Dream Hotline - April 26-28, 2024 (Last Weekend in April)
- National Dress Day - March 6
- National Dress Up Your Pet Day - January 14
- National Drinking Straw Day - January 3
- National Drive Electric Week (Formerly National Plug In Week) - September 27 - October 6, 2024
- National Drive-Thru Day - July 24
- National Drone Safety Day - June 18, 2024
- National Dropout Prevention Month - October
- National Drowning Prevention Day - July 27, 2024 (Fourth Saturday in July)
- National Drug & Alcohol Facts Week - March 18-24, 2024
- National Drunk and Drugged Driving Prevention Month - December
- National Dry Martini Day - June 19
- National Dry Shampoo Day - March 10, 2024 (Second Sunday in March)
- National Duckling Month - May
- National Dump the Pump Day - June 20, 2024 (Third Tuesday in June)
- National Dumpling Day - September 26
- National Duran Duran Appreciation Day - August 10
- National Earl Day - June 9
- National Easy-Bake Oven Day - November 4
- National Eat an Oreo Day - June 19
- National Eat at a Food Truck Day - June 28, 2024 (Fourth Friday)
- National Eat Dessert First Month - August
- National Eat Your Jello Day - July 12
- National Eating Disorders Awareness Week - February 26 - March 4, 2024 (Fourth Week in February)
- National Eating Healthy Day - November 6, 2024 (First Wednesday in November)
- National Eczema Week - September 13-21
- National Edge Day - October 17
- National Education Month - November
- National Educational Support Professionals Day - November 20, 2024 (Wednesday of Week before Thanksgiving)
- National Egg Day - June 3
- National Egg Month - January
- National Egg Month - May
- National Egg Salad Week - April 1-7, 2024 (Movable Week Observed the Week After Easter)
- National Eggnog Day - December 24
- National Eggnog Month - December
- National Eggs Benedict Day - April 16
- National Electric Guitar Day - November 27
- National Electricity Day - June 15
- National Email Week - June 9-15, 2024 (Second Full Week of June)
- National Embroidery Month - February
- National Emergency Responder Day - September 11
- National Emo Day - December 19
- National Empanada Day - April 8
- National Empanada Day - May 8
- National Employ Older Workers Week - September 22-28, 2024 (Last Full Week in September)
- National Employee Health and Fitness Day - May 15, 2024 (Third Wednesday in May)
- National Endometriosis Awareness Month - March
- National Energy Action Month - October
- National Energy Shopping Day - June 24, 2024 (First Monday of Summer)
- National Engineer's Week - February 18-24, 2024 (Third Full Week in February)
- National English Muffin Day - April 23
- National English Toffee Day - January 8
- National Enrolled Agents Month - February
- National Entrepreneurship Day - November 19, 2024 (Third Tuesday in November)
- National Entrepreneurship Week - February 10-17, 2024 (Third Week of February)
- National Environmental Education Week - Now this is Earth Month in April, as well as year round education.
- National Environmental Services Week - September 8-14, 2024
- National Eosinophil Awareness Week - May 19-25, 2024 (Third Week in May)
- National Epilepsy Awareness Month - November
- National Equal Pay Day - TBD
- National Ergonomics Month - October
- National Escape Day - January 30
- National Escargot Day - May 24
- National Espresso Day - November 23
- National Essential Tremor Awareness Month - March
- National Ethics Awareness Month - March
- National Etiquette Week - May 13-19, 2024 (Begins Second Monday of Full Week)
- National Everything You Do is Right Day - March 16
- National Everything You Think is Wrong Day - March 15
- National Ex-Spouse Day - April 14
- National Explosive Ordinance Disposal (EOD) Day - May 4, 2024 (First Saturday of May)
- National Eye Donor Month - March
- National Eye Exam Month - August
- National Eyewear Day - June 6
- National Face Your Fears Day - October 15, 2024 (Third Tuesday in October)
- National Facial Protection Month - April
- National Failures Day - August 15
- National Fajita Day - August 18
- National Fall Foliage Week - September 29 - October 5, 2024 (Begins on the Last Sunday in September)
- National Fallen Firefighters Memorial Weekend - May 4-5, 2024
- National Falls Prevention Awareness Day - September 23, 2024 (First Day of Fall)
- National Familiar Hypercholesterolemia Day - September 24
- National Family Bowling Day - October 14, 2022 (Second Friday in October)
- National Family Caregiver Day - November 1
- National Family Caregivers Month - November
- National Family Health History Day - November 28, 2024 (Always on Thanksgiving Day)
- National Family Literacy Day - November 1
- National Family Literacy Month - November
- National Family Meals Month - September
- National Family Month - (May 13 - June 17)
- National Family PJ Day - November 14
- National Family Recreation Day - June 1, 2024 (First Saturday in June)
- National Family Sexuality Education Month - Let's Talk - October
- National Family TV Show Day - October 3
- National Family Week - May 5-11, 2024 (First Full Week of May) and November 24-30, 2024 (Thanksgiving Week)
- National Farm & Ranch Safety and Health Week - September 15-21, 2024 (Third Full Week in September)
- National Farm Animals Awareness Week - September 21-27, 2024 (Third week of September)
- National Farm Animals Day - April 10
- National Farm-City Week - November 22-28, 2024 (Week that always ends on Thanksgiving Day)
- National Farm Joke Day - November 17
- National Farm Rescuer Day - March 21, 2024 (Third Thursday in March)
- National Farm Safety Day for Kids - September 21
- National Farm to School Month - October
- National Farm Workers Day - March 31
- National Farmers Day - October 12
- National Farmers Market Month - August
- National Farmers Market Week - August 4-10, 2024 (First Week of August)
- National Farriers Week - July 7-13, 2024 (First Full Week in July)
- National Fart Day - February 5
- National Fast Food Day - November 16
- National Fasting February - February
- National Feel the Love Day - September 7
- National Feral Cat Day - October 16
- National Ferret Day - April 2
- National Ferris Wheel Day - February 14
- National Fetal Alcohol Spectrum Disorders Awareness Month - August
- National Fetch Day - October 19, 2024 (Third Saturday in October)
- National Fettuccine Alfredo Day - February 7
- National FFA Week - February 17-24, 2024 (Week of George Washington's Birthday from Saturday - Saturday)
- National Fiber Focus Month - Entire Month of January & February
- National Fibromyalgia Awareness Day - May 12
- National Field Trip Month - October
- National Fig Newton Day - January 16
- National Fig Week - November 1-7
- National Filet Mignon Day - August 13
- National Film Score Day - April 3
- National Financial Awareness Day - August 14
- National Financial Capability Month - April
- National Financial Freedom Day - July 1
- National Fire Day - May 2
- National Fire Pup Day - October 1
- National Fishing & Boating Week - June 1-9, 2024 (First Week in June)
- National Fitness Day - May 4, 2024 (First Saturday in May)
- National Fix a Leak Week - March 17-23, 2024 (Third Full Week in March)
- National Flag Week - June 9-15, 2024 (The Week that starts with June 9th, so it includes June 14th - Flag Day)
- National Flannel Day - February 10
- National Flash Drive Day - April 5
- National Flashlight Day - December 21
- National Flip Flop Day - June 21, 2024 (Third Friday in June)
- National Flood Safety Awareness Week - Varies by State
- National Florida Tomato Month - April
- National Flossing Day - November 29, 2024 (Day After Thanksgiving)
- National Flour Month - March
- National Flower Day - March 21 and October 7
- National Flower Month - March
- National Fluffernutter Day - October 8
- National Foam Rolling Day (Massage) - May 11
- National Folic Acid Awareness Week - September 8-14, 2024 (Second Full Week of September)
- National Fondue Month - February
- National Food Bank Day - September 6, 2024 (First Friday in September)
- National Food Bank Week - October 13-19, 2024 (Week that has Oct. 16th in it - World Food Day)
- National Food Month - April
- National Food Safety Education Month - September
- National Food Service Employees Day - September 25
- National Food Services Workers Week - October 6-12, 2024 National Food Truck Day - June 28, 2024 (Last Friday in June)
- National Foot Health Awareness Month - April
- National Football Hangover Day - February 12, 2024 (Day after Super Bowl)
- National Forest Products Week - October 20-26, 2024 (Week that starts on the Third Sunday in October)
- National Forgiveness Day - October 7
- National Forgiveness Week - June 16-22, 2024 (Third Full Week in June)
- National Former Prisoner of War Recognition Day - April 9
- National Fossil Day - October 16, 2024 (Wednesday of the Second Full Week in October)
- National Foster Care Month - May
- National Foul Ball Week - May 16-21
- National Fragrance Day - March 21
- National Fragrance Month - November
- National Fragrance Week - March 18-24, 2024
- National Frappe Day - October 7
- National Fraud Awareness Week - August 4-10, 2024 (First Full Week in August)
- National FreeBSD Day - June 19
- National Freedom Day - February 1
- National Freedom to Marry Day - February 12
- National Freezer Pop Day - July 8
- National French Bread Day - March 21
- National French Dip Day - November 12
- National French Fries Day - July 13
- National French Toast Day - November 28
- National Fresh Breath Day - August 6
- National Fresh Celery Month - April
- National Fresh Fruit & Vegetable Month - June
- National Fresh Spinach Day - July 16
- National Fresh Squeezed Juice Day - January 15
- National Fresh Squeezed Juice Week - January 17-23
- National Fried Chicken Day - July 6
- National Fried Clam Day - July 3
- National Fried Rice Day - September 20
- National Fried Scallops Day - October 2
- National Fried Shrimp Day - December 20
- National Friends of Libraries Week - October 20-26, 2024 (Third Full Week of October)
- National Fritters Day - December 2
- National Frog Month - April
- National Frozen Custard Day - August 8
- National Frozen Food Day - March 2, 2024 (First Saturday in March)
- National Frozen Food Month - March
- National Frozen Yogurt Day - June 2, 2024
- National Frozen Yogurt Month - June
- National Frozen Yogurt Week - Fourth Week in May
- National Fruit and Veggies - More Matters Month - September
- National Fruit at Work Day - October 1, 2024 (First Tuesday in October)
- National Fruit Cake Day - December 27
- National Fruit Cake Month - December
- National Fruit Cocktail Day - May 13
- National Fruit Compote Day - March 1
- National FRUMP Day - October 14 (FRUMP = Frugal, Responsible, Unpretentious, Mature Persons Day)
- National Fudge Day - June 16
- National Fun at Work Day - January 26, 2024 (Last Friday in January)
- National Fun Day - April 1
- National Fun with Fondue Month - November
- National Funeral Director and Mortician Recognition Day - March 11
- National Gain the Inside Advantage Month - October
- National Game & Puzzle Week - November 24-30, 2024 (Sunday to Saturday of Thanksgiving Week)
- National Garage Sale Day - August 10, 2024 (Second Saturday in August)
- National Garden Month - April
- National Garden Week - June 2-8, 2024 (First Full Week of June)
- National Gardening Day - April 14
- National Gardening Exercise Day - June 6
- National Garlic Month - April
- National Gay Men's HIV/AIDS Awareness Day - September 27
- National Gazpacho Aficionado Month - May
- National Gazpacho Day - December 6
- National Genealogy Day - March 9, 2024 (Second Saturday in March)
- National Geographic Awareness Week - November 17-23, 2024 (Third Week of November)
- National Geographic Day - January 27
- National Georgia Pecan Month - November
- National German-American Day - October 6
- National German Chocolate Cake Day - June 11
- National Get Narly Day - July 26, 2024 (Last Friday in July)
- National Get Out of the Doghouse Day - July 15, 2024 (Third Monday in July)
- National Get Up Day - February 1
- National Ghost Hunting Day - September 28, 2024 (Last Saturday in September)
- National Ghostwriters Week - March 1-7
- National Gibberish Day - September 20
- National Gin Day - November 7
- National Gingerbread Day - June 5
- National Gingersnap Day - July 1
- National Girl Me Too Day - April 7
- National Girlfriend's Day - August 1
- National Girls & Women in Sports Day - February 7, 2024 (First Wednesday in February)
- National Girls Night in Day - September 22
- National Give Someone a Cupcake Day - May 8
- National Give Something Away Day - July 15
- National Giving Hearts Day - February 8, 2024 (Second Thursday in February)
- National Glaucoma Awareness Month - January
- National Glazed Spiral Ham Day - April 15
- National GLBT Book Month - June
- National Global Entrepreneurship Week - November 18-24, 2024
- National Gluten-Free Day - January 8, 2024 (Second Monday in January)
- National G.O.E. Day (Growth, Overcome, Empower) - October 6, 2024 (Sunday of the First Full Week in October)
- National Go Barefoot Day - June 1
- National Go Birding Day - April 27, 2024 (Last Saturday of April)
- National Go Cook For Your Pets Day - November 1
- National Go-Kart Week - September 15-21, 2024 (Third Week in September)
- National Go on a Field Trip Month - October
- National Goat Cheese Month - August
- National Goat Yoga Month - February
- National Golf Day - May 7, 2024 (First Tuesday in May) and October 4
- National Golf Month - August
- National Good Car-Keeping Month - May
- National Good Neighbor Day - September 28
- National Good Teen Day - January 16
- National Goof Off Day - March 22
- National Gossip Day - August 6
- National Gourmet Coffee Day - January 18
- National Graham Cracker Day - July 5
- National Grain Free Day - February 21
- National Grammar Day - March 4
- National Grand Marnier Day - July 14
- National Grandparent's Day - September 8, 2024 (First Sunday after Labor Day)
- National Granola Bar Day - January 21
- National Grape Popsicle Day - May 27
- National Grapefruit Month - February
- National Grasslands Week - June 16-22, 2024 (Third Week in June)
- National Grateful Patient Day - September 7
- National Gratitude Month - November
- National Gray Day - May 27
- National Greasy Foods Day - October 25
- National Great American Pot Pie Day - September 23
- National Green Bean Casserole Day - December 3
- National Green Juice Day - January 26
- National Green Week - February 4 - April 30, 2024 (Starts First Full Week of February through April 30th)
- National Grief Awareness Day - August 30
- National Grilled Cheese Month - April
- National Grilling Month - July
- National Griper's Day - April 15
- National Grouch Day - October 15
- National Groundwater Awareness Week - December 10-12, 2024
- National GSA Employee Day - July 1 (GSA = U.S. General Services Administration)
- National Guacamole Day - September 16 and November 14
- National Guide Dogs Month - September
- National Gumbo Day - October 12
- National Gumdrop Day - February 15
- National Gummi Worm Day - July 15
- National Gun Appreciation Day - January 19
- National Gun Violence Awareness Day - June 2, 2024
- National Gunpowder Day - November 5
- National Guy Pride Month - May
- National Gymnastics Day - September 21, 2024 (Third Saturday in September)
- National Haiku Poetry Day - April 17
- National Haiku Poetry Day - December 22
- National Haiku Writing Month - February
- National Hair Day - October 1
- National Ham Salad Day - December 18
- National Hamburger Day (May 27, 2024 (Always on Memorial Day), July 28, August 22, 2024 and also December 21)
- National Hamburger Month - May
- National Hamburger Week - Second Week in May
- National Hammock Day - July 22
- National Hand Holding Day - August 9
- National Hand Washing Awareness Week - December 1-7, 2024 (First Full Week of December)
- National Handbag Day - October 10
- National Handcuff Day - February 20
- National Handmade Day - April 7
- National Handshake Day - June 27, 2024 (Last Thursday in June)
- National Handwriting Analysis Week - January 21-27, 2024 (Week of John Hancock's Birthday of January 23)
- National Handwriting Day - January 23
- National Hanging Out Day - April 19
- National Hangover Day - January 1
- National Hard Candy Day - December 19
- National Harvey Wallbanger Day - November 8
- National Haskap Berry Day - June 29, 2024 (Last Saturday)
- National Hate Florida Day - February 18
- National Have a Bagel Day - December 11
- National Have a Coke Day - May 8
- National Have a Heart Day - February 14
- National Hazelnut Cake Day - June 1
- National Head Lice Prevention Month - September
- National Headache Awareness Week - June 2-8, 2024 (First Full Week of June)
- National Health Center Week - August 4-10, 2024 (Second Full Week in August)
- National Health Education Week - October 21-25, 2024 (Third M-F week of October)
- National Healthcare Decisions Day - April 16
- National Healthcare Documentation Integrity Week - May 19-25, 2024
- National Healthcare Food Service Workers Week - October 6-12, 2024
- National Healthcare Patient Transportation Week - November 3-9, 2024
- National Healthcare Quality Week - October 20-26, 2024 (Third Full Week of October)
- National Healthcare Resource & Materials Management Week - June 17-21, 2024
- National Healthcare Supply Chain Week - October 6-12, 2024
- National Healthy Eating Day - November 6
- National Healthy Fats Day - March 21
- National Healthy Skin Month - November
- National Heart Health Month - February
- National Heartworm Awareness Month - April
- National Heat Safety Awareness Day - May 24, 2024 (Fourth Friday in May)
- National Heatstroke Prevention Day - May 1
- National Heimlich Heroes Week - October 7-11, 2024 (First Full M-F Week in October)
- National Help a Horse Day - April 26
- National Hemp Day - February 4
- National Hepatitis Awareness Month - May
- National Herb Day - April 27, 2024 and May 4, 2024 (Last Saturday in April and First Saturday of May)
- National Herb Week - May 5-11, 2024 (Week Prior to Mother's Day)
- National Heritage Breeds Day - May 25, 2024 (Saturday of Third Full Week in May)
- National Heritage Breeds Week - May 19-25, 2024 (Third Full Week in May)
- National Hermit Day - October 29
- National Hermit Week - June 13-20
- National Hero Week - February 11-17, 2024 (Second Full Week of February)
- National High Blood Pressure Education Month - May
- National High Five Day - April 18, 2024 (Third Thursday of April)
- National Higher Education Day - June 6
- National Hike With a Geek Day - June 20
- National Hip Hop Day - August 11
- National Hippo Day - February 15
- National Hispanic Heritage Weeks - September 15, 2024 - October 15, 2024 (Last Two Weeks of September and First two weeks of October)
- National Historic Preservation Week - Second Week of May
- National Historically Black Colleges & Universities Week - September 18-25-194, 2024
- National HIV/AIDS and Aging Awareness Day - September 18
- National HIV Awareness Month - July
- National HIV Testing Day - June 27
- National Hoagie Day - May 5
- National Hobby Month - January
- National Hobo Week - August 8-10, 2024
- National Holistic Pet Day - August 30
- National Hollerin' Contest Day - June 15, 2024
- National Home-Based Business Week - October 6-12, 2024 (First Week of October)
- National Home Care Month - November
- National Home Furnishings Month - September
- National Home Warranty Day - February 10
- National Homebrew Day - May 4, 2024 (First Saturday in May)
- National Homeless Animals Day - August 17, 2024 (Third Saturday of August)
- National Homeless Persons Remembrance Day - December 21
- National Home Ownership Month - June
- National Homunculus Awareness Day - November 11
- National Honesty Day - April 30
- National Honey Bee Day - August 17, 2024 (Third Saturday of August)
- National Honey Month - September
- National Hoodie Hoo Day - February 20
- National Horchata Day - September 24
- National Horse Protection Day - March 1
- National Horseradish Month - July
- National Hospice Palliative Care Month - November
- National Hospital Day - May 12
- National Hospital Week - May 12-18, 2024 (Second week in May)
- National Hospitalist Day - March 7, 2024 (First Thursday in March)
- National Hot and Spicy Food Day - August 19
- National Hot Breakfast Month - February
- National Hot Chocolate Day - January 31
- National Hot Cross Bun Day - March 29, 2024 - same day as Good Friday (movable day) and September 11
- National Hot Dog Day - September 10 (Also on July 17, 2024 (Third Wednesday in July)
- National Hot Dog Month - July
- National Hot Fudge Sundae Day - July 24
- National Hot Heads Chili Day - January 17
- National Hot Mulled Cider Day - September 30
- National Hot Pastrami Sandwich Day - January 14
- National Hot Sauce Day - January 22
- National Hot Tea Day - January 12
- National Hot Tea Month - January
- National Hot Tub Day - March 28
- National Housewife Day - November 3
- National Hug a Kevin Day - October 10
- National Hug Holiday Week - May 7-13
- National Hug Your Boss Day - September 13, 2024
- National Hug Your Dog Day - April 10
- National Hug Your Hound Day - September 8, 2024 (Second Sunday in September)
- National Hug Your Puppy Day - January 21
- National Hugging Day - January 21
- National Human Service Awareness Week - October 6-12, 2024 (First Full Week of October)
- National Human Trafficking Awareness Day - January 11
- National Hummingbird Day - September 7, 2024 (First Saturday in September)
- National Humor Month - April
- National Hunger Awareness Day - June 6
- National Hunger & Homeless Awareness Week - November 9-17, 2024 (Begins on Second Saturday in November for 9 Days)
- National Hunting and Fishing Day - September 28, 2024 (Fourth Saturday in September)
- National Huntington's Disease Awareness Day - June 6
- National Hurricane Preparedness Week - May 5-11, 2024 (First Full Week in May)
- National HVAC Tech Day - June 22
- National Hydration Day - June 23
- National Hydrocephalus Awareness Month - September
- National Hydrogen and Fuel Cell Day - October 8
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