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
Nicaragua: Independence Day
Commemorates independence of the Central American provinces from Spanish rule in 1821
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 teenagers
Zimbabwe: Munhumutapa Day
Honours the pre-colonial ruler Munhumutapa and President Mnangagwa's vision of national development.Observances on September 15th 2025
New Zealand: Māori Language Week
Find out the dates, history and traditions of Māori Language Week.
USA: Google.com Day
Maybe Google should do a do0dle for their birthday?
USA: Greenpeace Day
Find out the dates, history and traditions of Greenpeace Day
United Nations: International Day of Democracy
The International Day of Democracy provides an opportunity to review the state of democracy in the world.
USA: International Dot Day
A day to consider the mark that you make upon the world.
USA: National Creme de Menthe Day
Find out the dates, history and traditions of National Creme de Menthe Day
USA: National Double Cheeseburger Day
Find out the dates, history and traditions of National Double Cheeseburger Day
USA: National Felt Hat Day
Find out the dates, history and traditions of National Felt Hat Day
USA: National Linguine Day
Find out the dates, history and traditions of National Linguine Day
Slovenia: Return of Primorska to the Motherland
Primorsko Reunification Day has been a national holiday since 2006, but it is not a work-free day.
Serbia: Serbian Unity, Freedom and National Flag Day
The Salonica front, was a military theatre of the first world war formed as a result of an attempt by the Allied Powers to aid Serbia, in 1915, against the combined attack of Germany, Austria-Hungary and Bulgaria.
International: World Afro Day
A day where people are encouraged to celebrate kinky, coiled or curly afro textured hair and to learn more about it.
USA: Hispanic Heritage Month
The monthlong period is a time to learn about the people who have influenced America in such a great way and learn about the culture that has significantly influenced American culture.
USA: National Online Learning Day
National Online Learning Day showcases how students of all ages are thriving with the ability to learn online—anywhere, anytime.September 14th 2025 | Go to Today | September 16th 2025
| Choose a Day |
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| General Information for September 15th 2025 | |
|---|---|
| There are 11 public holidays today. | |
| Day 258 of 2025 | |
| 107 days left in 2025 | |
| Week 38 of the year | |
| On this Day in History | |
| 1993 - Liechtenstein Prince Hans-Adam II disbands Parliament | |
| 1959 - Nikita Khrushchev becomes the first Soviet leader to visit the United States. | |
| 1835 - HMS Beagle, with Charles Darwin aboard, reaches the Galápagos Islands. The ship lands at Chatham or San Cristobal, the easternmost of the archipelago. | |
| 1440 - Gilles de Rais, one of the earliest known serial killers, is taken into custody upon an accusation brought against him by the Bishop of Nantes. |
Office Holidays provides calendars with dates and information on public holidays and bank holidays in key countries around the world.
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