This is our day guide for Thursday September 3rd 2026 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 2026
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 2026 | Go to Today | September 4th 2026
| Choose a Day |
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| General Information for September 3rd 2026 | |
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| There are 1 public holidays today. | |
| Day 246 of 2026 | |
| 119 days left in 2026 | |
| 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. | |
| 1945 - Three-day celebration was held in China, following the Victory over Japan Day on September 2. | |
| 1875 - The first official game of polo is played in Argentina after being introduced by British ranchers. | |
| 1260 - The Mamluks defeat the Mongols at the Battle of Ain Jalut in Palestine, marking their first decisive defeat and the point of maximum expansion of the Mongol Empire. |
Office Holidays provides calendars with dates and information on public holidays and bank holidays in key countries around the world.
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