21 October 2023

• 294th day of the year. There were then 71 days left in 2023.
• 42nd Saturday of 2023.
• on the 42nd week of 2023 (using ISO standard week number calculation).
• Birthstone for this day: Opal and Tourmaline

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

• Finno-Ugrian Days (Hõimupäev) - Estonia
• Maha Saptami (महा सप्तमी) - India
• World War II Victims Remembrance Day (Дан сећања на српске жртве у Другом светском рату) - Popular in: Serbia
• Apple Day - United Kingdom
• Police Commemoration Day - India
• Sweetest Day - United States