12 September 2023

• 255th day of the year. There were then 110 days left in 2023.
• 37th Tuesday of 2023.
• on the 37th week of 2023 (using ISO standard week number calculation).
• 84th day of Summer. There were 11 days left till Fall.
• Birthstone for this day: Sapphire

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

• United Nations Day for South-South Cooperation - Popular in:
  CountryAustraliaCanadaIndiaNew ZealandSouth AfricaUnited KingdomUnited States
• Ethiopian New Year - Popular in: United States, United Kingdom, Canada
• MTV Video Music Awards - United States
• Día del Historiador - Mexico