(I forgot to select the Category, this is a bug report.)

(details of pictures)

①https://vrchat.com/home/group/grp_a93aedbf-20de-4197-a2e5-74019a131fe9

The event tab in the group page. It's not limited to the one group, 'ALL' groups have this issue. The 'Upcoming' is work(Ongoing maybe also works?), but I never saw anything in the 'Past' tab since the system exists, which is a bit annoying since I often refence the event page when I post event photos in the Twitter to leave some trace to the contents while encourage people to the event feature

②https://vrchat.com/home/group/grp_a93aedbf-20de-4197-a2e5-74019a131fe9/calendar/cal_110e2773-7608-408f-8bf3-4a847bd5c81b)

Yesterday's event, this very group also have many normal events while also have repeat events set, which is one of the reason I made it as sample

③https://vrchat.com/home/calendar

The event will exist in the calendar page in the website. Which is the only way to found past events later on. But this only work if you in the group, since you can join Group+/Group Public without actual join the group. This is what I often did, but since my group is full on 200 with VRC+, I can't easily get the link anymore if I forgot to add the event, unless owner themselves mentioned it in their SNS.(it's a bit hard to contact people for this kind of minor stuffs.)

④(In-game picture)

It's work a bit different in the game so it's possible to found the past event in same month, but it's not possible to check the events in the past months so can't count as reliable way.(like when you do the event in the last day of the month, but finished in the next day mid-night)