WikiMoon:Anniversaries/December 21
- Kunihiko Ikuhara, series and episode director for the Sailor Moon anime, was born on this day in 1964.
- Yumie Sakaguchi, the fourth actress to play Sailor Galaxia in the Sailor Moon musicals, was born on this day in 1974.
- Episode 81 of the English dub, "Final Battle," premiered on US TV on this day in 1998.
- Episode 145 of the English dub, "Dreams of Her Own," premiered on US TV on this day in 2000.