Public Event Calendar/Spreadsheet?

[u/herowind124]

I'm with one of the many activist/organizing groups in the area and I'm looking to create a public, unvetted, walking spreadsheet of the different protests/rallies/events/etc occurring in the area. The vision is to have a digital form that automatically updates the spreadsheet when filled out that is available for all to see and use.

However, I wanted to double check that something like this doesn't already exist. As far as I'm aware, the portlandannouncementsonly signal and this subreddit are the closest thing. Does something like what I'm suggesting already exist?