12 September 2025

12 September 2025 is ...

• 255th day of the year. There are then 110 days left in 2025.
• 37th Friday of 2025.
• on the 37th week of 2025 (using ISO standard week number calculation).
• 85th day of Summer. There are 10 days left till Fall.
• Birthstone for this day: Sapphire

12 September 2025 European Union Holidays & Popular Observances

There are no major holidays or observances in the EU for this date.

12 September 2025 Popular Holidays & Observances Worldwide

• United Nations Day for South-South Cooperation - Popular in: Australia, Canada, United Kingdom, India, New Zealand, United States, South Africa
• Día del Historiador - Mexico