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March
| Day | Name | Established/recognized by |
|---|---|---|
| March 1 | World Civil Defence Day[42] | |
| March 1 | National Pig Day (USA) | |
| March 1 | Self-Injury Awareness Day | Also known as Self-Harm Awareness Day |
| March 2 | Employee Appreciation Day | |
| March 2 | Texas Independence Day | |
| March 2 (or closest school day) | Read Across America Day (USA) | National Education Association |
| March 3 | World Wildlife Day | UN[43] |
| March 3 | World Hearing Day | WHO |
| March 3 | Liberation Day of the Republic of Bulgaria | |
| March 4 | International HPV Awareness Day | International Papilloma Society |
| March 8 | International Women's Day | UN[44] |
| March 10 | National Women and Girl's HIV/AIDS Awareness Day[45] | |
| March 10 | Mario Day | |
| March 10 or Friday of first full week | Middle Name Pride Day[46] | |
| March 11 | National Singles Day and Solo Poly Day (worldwide) | UK[47] [48] |
| March 12 | World Glaucoma Day[49] | |
| March 14 | Pi Day | |
| March 14 | Steak and Blowjob Day | |
| March 14 | White Day (Japan) | |
| March 15 | World Consumer Rights Day, World Sleep Day | |
| March 15 | World Contact Day | |
| March 18 | Transit Driver Appreciation Day | |
| March 18 | National Covid's Victims Day (Italy) | Italy[50] |
| March 20 | Li-Fraumeni Syndrome Awareness Day[51] | Living LFS, a 501(c)(3) nonprofit that encourages, empowers, and educates those living with Li–Fraumeni syndrome. |
| March 20 | World Oral Health Day[52] | World Dental Federation (FDI) |
| March 20 | International Day of Francophonie[53] | |
| March 20 | International Day of Happiness | UN[13][54] |
| March 20 | World Sparrow Day[55] | |
| March 20 | World Rights to Water Day[56] | |
| March 21 | Anal Cancer Awareness Day[57] | |
| March 21 | Cluster Headache Awareness Day[58] | Promoted by OUCH (Organisation for the Understanding of Cluster Headaches) alongside The European Headache Federation and European Headache Alliance. |
| March 21 | Human Rights Day (South Africa)[59] | South Africa |
| March 21 | International Colour Day | |
| March 21 | International Day for the Elimination of Racial Discrimination | UN[13] |
| March 21 | World Poetry Day | UN, UNESCO[13][60] |
| March 21 | International Day of Nowruz | UN[13][61] |
| March 21 | World Down Syndrome Day | UN[13][62] |
| March 21 | World Puppetry Day | UNIMA |
| March 21 | International Day of Forests | UN[13][63] |
| March 22 | World Water Day | UN[13][64] |
| March 23 | Pakistan Day | |
| March 23 | World Meteorological Day | UN, WMO, WHO[13][65] |
| March 23 | National Puppy Day (USA)[66][67] | |
| March 24 | World Tuberculosis Day[68] | UN, WHO[13][69] |
| March 25 | International Day of Remembrance of the Victims of Slavery and the Transatlantic Slave Trade | UN[13][70] |
| March 25 | International Day of the Unborn Child | Catholic Church |
| March 25 | Observance of National Genocide Day[71] | BPCA[72] |
| March 25 | EU Talent Day | |
| March 25 | FND Awareness Day UK | For functional neurological disorder and non-epileptic attack disorder[73][74] |
| March 25 | Tolkien Reading Day | |
| March 26 | Bangladesh Independence Day | |
| March 26 | Purple Day for epilepsy | |
| March 27 | World Theatre Day | |
| March 27 | Muslim Women's Day | |
| March 30 | World Bipolar Day[75] | International Society for Bipolar Disorders |
| March 30 | World Bass Day[76] | Institute for Bass Sciences |
| March 31 | International Drug Checking Day[77][78][79][80] | |
| March 31 | World Backup Day[81] | |
| March 31 | International Transgender Day of Visibility | |
| March (First Saturday of the NCAA Men's Division I Basketball Championship) | National Corndog Day (USA) | |
| March (Second Thursday) | World Kidney Day | |
| Monday before Shrove Tuesday | Nickanan Night, Collop Monday. Hall' Monday[82] |