Lunar calendar and global observances for September 26, 2026

September 26, 2026, corresponds to the 16th day of the 8th lunar month in the year of Binh Ngo. In the Vietnamese lunar calendar, this is the day of Quy Mao within the month of Dinh Dau. The day falls during the Autumn Equinox solar term.

Globally, September 26 marks World Environmental Health Day, an initiative promoted by the International Federation of Environmental Health (IFEH) to raise awareness regarding the link between environmental factors—such as air and water quality—and human health. Additionally, the date is recognized as World Contraception Day, aimed at promoting awareness of contraceptive methods and sexual health.