In case you have not seen it before, @itchio has one of the most comprehensive calendars of game jams out there. ๐๏ธ
Warning: there are A LOT of game jams.
itch.io/jams
Before Christmas we held a mini game jam themed around marine & costal energy. We were astounded with the output in such a small time period! From fully working multiplayer to VR, we're incredibly proud of what our students achieved! @PlymUni#GameDev#GameJam