imported my google calendar full backup into tuta calendar.
All this daily recurring forever spam which google used to take from well crafted spam emails and add directly to calendar without asking, which i had deleted... was annoyingly still in the downloaded output from my google account takeout.
Thus now i get to delete it again, all 30ish of em.
At least now i can look back beyond a year or two, which google seems to have quietly removed the ability to do