The Blue Moon in 2023 occurred at the end of August: the full Blue Moon peaked on August 30–31, 2023, depending on your time zone.

Because of time zones, many sources list:

  • August 30, 2023, evening (in North America) as the Blue Moon night.
  • August 31, 2023, at 01:35 UTC as the exact full Moon moment, which still falls on the night of August 30–31 for most of the world.

So if you’re just wondering “when is the blue moon 2023” to mark a calendar, the answer is: the night of August 30–31, 2023.

Information gathered from public forums or data available on the internet and portrayed here.