This is our day guide for Wednesday September 3rd 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 3rd 2025
San Marino: Foundation Day
San Marino was founded in 301 AD by St. Marinus, a stone mason from Croatia who wanted to escape persecution by the emperor DiocletianSeptember 2nd 2025 | Go to Today | September 4th 2025
| Choose a Day |
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| General Information for September 3rd 2025 | |
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| There are 1 public holidays today. | |
| Day 246 of 2025 | |
| 119 days left in 2025 | |
| Week 36 of the year | |
| On this Day in History | |
| 1967 - Dagen H in Sweden: traffic changes from driving on the left to driving on the right overnight. | |
| 1935 - Sir Malcolm Campbell reaches a speed of 304.331 miles per hour on the Bonneville Salt Flats in Utah, becoming the first person to drive an automobile over 300 mph | |
| 1783 - American Revolutionary War: the war ends with the signing of the Treaty of Paris by the United States and the Kingdom of Great Britain. | |
| 590 - Consecration of Pope Gregory I (Gregory the Great). |
Office Holidays provides calendars with dates and information on public holidays and bank holidays in key countries around the world.
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