| April 1 |
April Fools' Day |
|
| April 1 |
Edible Book Festival |
|
| April 2 |
World Autism Awareness Day |
UN[13][83] |
| April 2 |
International Children's Book Day |
|
| April 4 |
International Day for Mine Awareness and Assistance in Mine Action |
UN |
| April 5 |
National Maritime Day |
|
| April 6 |
International Day of Sport for Development and Peace |
UN[13] |
| April 6 |
World Bohring-Opitz Syndrome Awareness Day[84] |
|
| April 7 |
Day of Remembrance of the Victims of the Rwanda Genocide |
UN[13][85] |
| April 7 |
World Health Day[68] |
UN, WHO[13][86] |
| April 8 |
International Romani Day |
|
| April 10 |
World Homeopathy Day |
|
| April 10 |
Siblings Day (some countries) |
|
| April 11 |
International Louie Louie Day |
|
| April 12 |
Equal Pay Day |
|
| April 12 |
Cosmonautics Day |
|
| April 13 |
FND Awareness Day[87] |
functional neurological disorder and conversion disorder.
FND Hope; since adopted by other groups and medical professionals worldwide.[88][89][90] |
| April 14 |
Black Day (South Korea) |
|
| April 14 |
Pohela Boishakh (Bangla New Year's Day) |
|
| April 14 |
Cake and Cunnilingus Day |
|
| April 15 |
Day of Dialogue |
|
| April 15 |
World Bleeding Disorders Awareness Day |
World Federation of Hemophilia |
| April 16 |
National Healthcare Decisions Day (US)[91] |
|
| April 16 |
Foursquare Day |
|
| April 16 |
World Voice Day |
|
| April 17, 18 and 19 have been used |
Record Store Day |
|
| April 17 |
World Haemophilia Day |
|
| April 18 |
International Day For Monuments and Sites |
|
| April 18 |
Youth Homelessness Matters Day |
National Youth Coalition for Housing, Australia |
| April 19 |
Bicycle Day |
|
| Third Thursday of April |
National High Five Day (USA) |
|
| April 20 |
420: international day for cannabis-related protests and events |
Global cannabis culture[92][93][94] |
| April 21 |
Day of Silence |
|
| April 21 |
National Tea Day |
|
| April 22 |
Earth Day |
|
| April 22 |
International Mother Earth Day |
UN[13][95] |
| April 22 (UK) |
Administrative Professionals' Day |
|
| April 23 |
World Book and Copyright Day |
UN, UNESCO[13][96] |
| April 23 |
English Language Day[13] |
|
| April 24 |
Armenian Genocide Remembrance Day |
|
| April 24 |
World Meningitis Day[97] |
|
| April 24 |
Fashion Revolution Day |
|
| April 24 |
International Sculpture Day |
|
| April 24 |
World Day for Laboratory Animals |
|
| April 25 |
DNA day |
|
| April 25 |
World Malaria Day[68] |
UN, WHO[13][98] |
| April 25 |
International Delegate's Day[99] |
UN[13] |
| April 25 |
Parental Alienation Awareness Day |
|
| April 25 |
ANZAC Day |
|
| April 25 |
Liberation Day (Italy) |
|
| April (North America: Wednesday of last full week) |
Administrative Professionals' Day |
|
| April 26 |
World Intellectual Property Day |
|
| April 27 |
King's Day (The Netherlands) |
|
| April 27 |
Freedom Day (South Africa) |
|
| April 28 |
World Day for Safety and Health at Work |
UN, ILO[13][100] |
| April 29 |
Day of Remembrance for all Victims of Chemical Warfare |
UN[13][101] |
| April 29 |
International Dance Day |
UNESCO[102] |
| April 30 |
International Jazz Day |
UN[13][103] |
