T239254 is a neverending task. It should be a proper project tag instead, as tasks should not be neverending. (Tasks have a status but this task will always be open.)
I also don't really get which problem is solved by "calendar year" subtasks...
If this was fixed, I'd also remove "2020" in https://www.mediawiki.org/wiki/Wikimedia_Technical_Talks#Propose_a_Wikimedia_monthly_technical_talk . Plus must fix the Phab template link in there.
@srodlund: Would you agree?