22 December 2023

• 356th day of the year. There were then 9 days left in 2023.
• 51st Friday of 2023.
• on the 51st week of 2023 (using ISO standard week number calculation).
• Birthstone for this day: Turquoise & Blue Topaz

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

• Winter Solstice - United States, Spain, India, United Kingdom
• Summer Solstice -
  CountryArgentinaBoliviaBrazil / BrasilChileEcuadorParaguayPeruUruguay
• National Mathematics Day - India