17 September 2025

• 260th day of the year. There are then 105 days left in 2025.
• 38th Wednesday of 2025.
• on the 38th week of 2025 (using ISO standard week number calculation).
• 90th day of Summer. There are 5 days left till Fall.
• Birthstone for this day: Sapphire

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

• Constitution Day - United States
• Australian Citizenship Day - Australia
• Marathwada Liberation Day - India
• Día del Profesor - Argentina