18 September 2026

• 261st day of the year. There are then 104 days left in 2026.
• 38th Friday of 2026.
• on the 38th week of 2026 (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 UK for this date.

• National Cheeseburger Day - Popular in: United States, Canada
• Chile Independence Day - Popular in: United States
• Fiestas Patrias - Chile
• Dia da Independência do Chile - United States
• AIDS and Aging Awareness Day - United States
• European Heritage Days Starts - European Union