January
| Whole Month | One Health Awareness Month |
| Whole Month | Adopt a Rescued Bird Month |
| Whole Month | Walk Your Pet Month |
| Whole Month | Train Your Dog Month |
| January 1 | New Year’s Day |
| January 2 | National Pet Travel Safety Day |
| January 3 | New Year’s Day (in lieu) |
| January 5 | National Bird Day |
| January 6 | National Cuddle Up Day |
| January 17 | Martin Luther King Jr. Day |
| January 21 | National Squirrel Appreciation Day |
February
| Whole Month | American Heart Month |
| Whole Month | National Pet Dental Health Month |
| Whole Month | Responsible Pet Owners Month |
| February 20 | Love Your Pet Day |
| February 21 | President’s Day |
| February 22 | National Wildlife Day |
| February 23 | International Dog Biscuit Appreciation Day |
| February 27 | International Polar Bear Day |
March
| March 3 | World Wildlife Day |
| March 8 | International Women’s Day |
| March 20-26 | Poison Prevention Week |
| March 23 | National Puppy Day |
April
| Whole Month | American Red Cross Pet First Aid Awareness Month |
| Whole Month | National Frog Month |
| Whole Month | National Heartworm Awareness Month |
| Whole Month | Prevention of Cruelty to Animals Month |
| Whole Month | Prevention of Lyme Disease in Dogs Month |
| April 2 | Every Day is Tag Day |
| April 4-10 | National Public Health Week |
| April 7 | World Health Day |
| April 10-16 | National Dog Bite Prevention Week® |
| April 10-16 | National Animal Care and Control Appreciation Week |
| April 11 | National Pet Day |
| April 14 | National Dolphin Day |
| April 17 | National Bat Appreciation Day |
| April 17 | Easter Sunday |
| April 18 | National Pet ID Week |
| April 20 | 4/20 Day |
| April 21 | Biomedical Research Awareness Day |
| April 25 | World Penguin Day |
| April 27 | International Guide Dog Day |
| April 28 | National Kids and Pets Day |
| April 29 | Hairball Awareness Day |
| April 30 | National Adopt a Shelter Pet Day |
| April 30 | World Veterinary Day |
May
| Whole Month | National Service Dog Eye Examination Month |
| Whole Month | Asthma and Allergy Awareness Month |
| May 1-7 | National Pet Week |
| May 1-7 | Be kind to animals week |
| May 3 | National Specially-abled Pets Day |
| May 7 | National Wildfire Preparedness Day |
| May 8 | Mother’s Day |
| May 14 | National Animal Disaster Preparedness Day |
| May 20 | National Endangered Species Day |
| May 23 | World Turtle Day |
| May 30 | Memorial Day |
June
| Whole Month | Adopt-a-Cat Month® |
| Whole Month | AKA Adopt a Shelter Cat Month |
| Whole Month | National Zoo and Aquarium Month |
| Whole Month | National Dairy Month |
| Whole Month | National Pet Preparedness Month |
| June 4 | Hug Your Cat Day |
| June 5-11 | Pet Appreciation Week |
| June 7 | World Food Safety Day |
| June 8 | World Oceans Day |
| June 14 | World Pet Memorial Day |
| June 19 | Juneteenth |
| June 19 | Father’s Day |
| June 20 | Juneteenth (in lieu) |
| June 20 | Juneteenth |
| June 20-26 | National Pollinator Week |
| June 20 | National Insurance Awareness Day (all types) |
| June 24 | Take Your Dog to Work Day |
July
| Whole Month | Adopt a Rescued Rabbit Month |
| July 3-9 | National Farriers Week |
| July 4 | Independence Day |
| July 6 | World Zoonoses Day |
| July 14 | Shark Awareness Day |
| July 15 | National Pet Fire Safety Day |
| July 31 | National Mutt Day |
August
| Whole Month | National Immunization Awareness Month |
| Whole Month | Itchy Pet Awareness Month |
| August 7-13 | International Assistance Dog Week |
| August 8 | International Cat Day |
| August 15 | Check the Chip Day |
| August 22 | National Take Your Cat to the Vet Day |
| August 26 | International Dog Day |
September
| Whole Month | Animal Pain Awareness Month |
| Whole Month | Happy Cat Month |
| Whole Month | National Disaster Preparedness Month |
| Whole Month | National Food Safety Education Month |
| Whole Month | National Service Dog Month |
| Whole Month | Responsible Dog Ownership Month |
| September 5 | Labor Day |
| September 8 | National Iguana Awareness Day |
| September 11 | National Pet Memorial Day |
| September 11-17 | National Farm Health and Safety Week |
| September 16 | National Teach Ag Day |
| September 18-24 | Telehealth Awareness Week |
| September 18-24 | Deaf Dog Awareness Week |
| National Elephant Appreciation Day | |
| September 25 – October 1 | Sea Otter Awareness Week |
| September 28 | World Rabies Day |
October
| Whole Month | Adopt a Shelter Dog Month |
| Whole Month | National Pet Wellness Month |
| October 1 | World Vegetarian Day |
| October 1-7 | National Walk Your Dog Week |
| October 4 | World Animal Day |
| October 10 | US Indigenous People’s Day |
| October 10 | Columbus Day |
| October 12 | National Pet Obesity Awareness Day |
| October 16 | World Food Day |
| October 16-22 | National Veterinary Technician Week |
| October 20 | International Shakeout Day |
| October 21 | Reptile Awareness Day |
| October 21 | National Pets for Veterans Day |
| October 29 | National Cat Day |
November
| Whole Month | Adopt a Senior Pet Month |
| Whole Month | National Pet Cancer Awareness Month |
| Whole Month | National Pet Diabetes Month |
| Whole Month | Manatee Awareness Month |
| November 3 | One Health Day |
| November 6-12 | National Animal Shelter Appreciation Week |
| November 8 | International Human-Animal Bond Day (event created by HABA) |
| November 11 | Veterans Day |
| November 17-23 | US Antibiotics Awareness Week |
| November 24 | Thanksgiving |
| November 25 | Day after Thanksgiving |
December
| December 2 | National Mutt Day |
| December 4 | World Wildlife Conservation Day |
| December 13 | National Day of the Horse |
| December 15 | Cat Herders Day |
| December 25 | Christmas Day |
| December 26 | Christmas Day (in lieu) |
| December 27 | Visit the Zoo Day |