This is our day guide for Monday September 15th 2025 which shows you at a glance what's happening on this day around the world. Using the calendar on this page, you can look at a day guide for any day. Why not look up your birthday to see which holidays you share it with?
Holidays on September 15th 2025
Regional
Bolivia (regional): Cochabamba Day (in lieu)
The Day of the Cochabamba Department takes place on September 14th marking the second foundation of the city on that day in 1574.
Costa Rica: Independence Day
Local celebrations, national pride and a spirit of community mark Costa Rica’s Independence Day. One of the year’s most important holidays, Costa Rica celebrates its freedom from colonial Spain with peaceful festivities and historic traditions.
El Salvador: Independence Day
Celebrates independence from Spain, achieved in 1821
Guatemala: Independence Day
Commemorates independence of the Central American provinces from Spanish rule in 1821
Honduras: Independence Day
Commemorates the independence of the Central American provinces from Spanish rule in 1821
Japan: Respect for the Aged Day
Respect of the Aged Day was established as a national holiday in 1966 to express respect for the elders in the community
Malaysia: Malaysia Day Holiday
An additional public holiday in conjunction with the 2025 Malaysia Day celebration.
Nicaragua: Independence Day
Commemorates independence of the Central American provinces from Spanish rule in 1821
Papua New Guinea: Independence Day Holiday
Commemorates the day Papua New Guinea gained its indepence from Australia in 1975
Slovakia: Day of Our Lady of Sorrows
In 1727, Pope Benedict XIII declared Our Lady of Sorrows to be respected by the Church and its members as a Patron of Slovakia and later in 1966 was declared by Pope Paul VI as the main Patron.Regional
Spain (regional): Lady of Aparecida
Honours the Virgin Mary, Cantabria's patron saint through a statue that was found at the start of the 17th century.Regional
Switzerland (regional): Knabenschiessen
Zurich only. Knabenschiessen is a traditional shooting competition for teenagersNot a Public Holiday
Zimbabwe: Munhumutapa Day
Honours the pre-colonial ruler Munhumutapa and President Mnangagwa's vision of national development.September 14th 2025 | Go to Today | September 16th 2025
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| General Information for September 15th 2025 | |
|---|---|
| There are 13 public holidays today. | |
| Day 258 of 2025 | |
| 107 days left in 2025 | |
| Week 38 of the year | |
| On this Day in History | |
| 1981 - The Pacific island of Vanuatu becomes a member of the United Nations. | |
| 1940 - World War II: The climax of the Battle of Britain, when the Royal Air Force shoots down large numbers of Luftwaffe aircraft. | |
| 1835 - HMS Beagle, with Charles Darwin aboard, reaches the Galápagos Islands. The ship lands at Chatham or San Cristobal, the easternmost of the archipelago. | |
| 994 - Major Fatimid victory over the Byzantine Empire at the Battle of the Orontes. |
Office Holidays provides calendars with dates and information on public holidays and bank holidays in key countries around the world.
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