Holidays by date
Holidays on September 15
National public holidays observed on the 15th of September across all countries — for both 2026 and 2027.
2026
7 countries2027
11 countriesChina
Mid-Autumn Festival
Costa Rica
Independence Day
El Salvador
Independence Day
Guatemala
Independence Day
Honduras
Independence Day
Nicaragua
Independence Day
Slovakia
Day of Our Lady of the Seven Sorrows
Slovenia
Integration of Primorska into the Homeland
South Korea
Chuseok
Sri Lanka
Binara Full Moon Poya Day
Taiwan
Mid-Autumn Festival