First Day Of Summer In Australia May 2026

Summer Down Under: Why December 1st (Not the Solstice) Kicks Off the Fun

Happy first day of Summer, Australia!

While the Northern Hemisphere is bundling up for Christmas, Australia is firing up the barbie. Astronomically, summer begins on the Summer Solstice (around December 21-22). However, for most Australians—meteorologists, sports clubs, and families alike— summer officially starts on December 1st. first day of summer in australia