I just happened to be on the calandars . com website and saw a Firefly 2022 Wall Calendar for the 20th anniversary. I don't know if there is one every year for the show, but I thought the fans might want to know about it.
https://www.calendars.com/shop/firef...r/202200002866
https://www.calendars.com/shop/firef...r/202200002866