January
- World Leprosy Day – Last Sunday of January
February
- World Cancer Day – February 4
- International Epilepsy Day – Second Monday of February
- World Day of the Sick – February 11
- Rare Disease Day – Last day of February, or 28th on non-leap years
March
- World Hearing Day – March 3
- International Women’s Day (Health Focus) – March 8
- World Kidney Day – March 13 (Second Thursday of March)
- World Sleep Day – March 14 (Friday before Spring Equinox)
- World Tuberculosis Day – March 24
April
- World Health Day – April 7
- World Parkinson’s Day – April 11
- World Hemophilia Day – April 17
- World Malaria Day – April 25
- World Immunization Week – April 24–30
May
- World Asthma Day – May 6 (First Tuesday of May)
- World Red Cross Day – May 8
- World Hypertension Day – May 17
- World No Tobacco Day – May 31
June
- World Blood Donor Day – June 14
- International Day Against Drug Abuse and Illicit Trafficking – June 26
July
- World Hepatitis Day – July 28
August
- World Breastfeeding Week – August 1–7
- International Youth Day (Health Focus) – August 12
September
- World Alzheimer’s Day – September 21
- World Heart Day – September 29
October
- World Mental Health Day – October 10
- World Arthritis Day – October 12
- World Sight Day – October 9 (Second Thursday of October)
- World Osteoporosis Day – October 20
- Breast Cancer Awareness Month – All of October
November
- World Diabetes Day – November 14
- World Antibiotic Awareness Week – November 18–24
December
- World AIDS Day – December 1
- International Day of Persons with Disabilities – December 3
These awareness days aim to promote education, awareness, and prevention on critical health issues globally.