| Euro Day | |  |
| National First Foot Day | | |
| Ring A Bell Day | | |
| Humiliation Day | | |
| Tom Thumb Day | | |
| National Take Down The Christmas Tree Day | | |
| Word Nerd Day | | |
| Heritage Treasures Day | | |
| National Youth Day in India | | |
|
| Korean American Day | | |
| National Appreciate A Dragon Day | | |
| National Religious Freedom Day | | |
| Museum Selfie Day | | |
| Toad Hollow Day Of Encouragement | | |
| International Day of Commemoration in Memory of the Victims of the Holocaust | | |
| Black History Month | | |
| World Hijab Day | | |
| World Interfaith Harmony Week | | |
| Leap Day | | |
| Women's History Month | | |
| French Language Day | | |
| International Francophonie Day | | |
| World Poetry Day | | |
| Eiffel Tower Day | | |
|
| National Atheist Day | | |
| International Romani Day | | |
| National Winston Churchill Day | | |
| National Thomas Jefferson Day | | |
| National Pan American Day | | |
| National Titanic Remembrance Day | | |
| National Ellis Island Family History Day | | |
| International Day for Monuments and Sites | | |
| National Oklahoma City Bombing Commemoration Day | | |
| Chinese Language Day | | |
| National Yellow Bat Day | | |
| English Language Day | | |
| Spanish Language Day | | |
| National East Meets West Day | | |
| Gathering Of Nations | | |
| National Day of Reason | | |
| Leprechaun Day | | |
| International Museum Day | | |
| World Day for Cultural Diversity for Dialogue and Development | | |
| Russian Language Day | | |
| National Boone Day | | |
| National Paul Bunyan Day | | |
| National Amelia Earhart Day | | |
| Norfolk Day | | |
| National Dollar Day | | |
| International Day of the World's Indigenous People | | |
| National Spirit of ’45 Day | | |
| National Airborne Day | | |
| International Day for the Remembrance of the Slave Trade and its Abolition | | |
| Uncle Sam Day | | |
| European Heritage Days | | |
| Mayflower Day | | |
| Chainmail Day | | |
| Mabon | | |
| Schwenkfelder Thanksgiving | | |
|
| Black History Month | | |
| National German-American Day | | |
| General Pulaski Memorial Day | | |
| Black Poetry Day | | |
| National Immigrants Day | | |
| Girl Scout Founder’s Day | | |
| World Freedom Day | | |
| International Day for Tolerance | | |
| Occult Day | | |
| National Day of Mourning | | |
| D.B. Cooper Day | | |
| International Day of Solidarity with the Palestinian People | | |
| Santa's List Day | | |
| National Repeal Day | | |
| International Day Of Neutrality | | |
| Saturnalia December | | |
| Arabic Language Day | | |
| Mudd Day | | |
| Yule | | |
| Forefathers Day | | |
| National Roots Day | | |
| Pledge of Allegiance Day | | |
