There is this existing list (limited to English language for some reason)
https://en.wikipedia.org/wiki/Wikipedia:How_to_run_an_edit-a-thon#List_of_ed
it-a-thons_in_English_language_or_in_English_speaking_countries
-Original Message-
From: gendergap-boun...@lists.wikimedia.org
I've made short lists of workshops and edit-a-thons on a couple relevant
pages.
I'm wondering if there's a place that exists or could be created linking
to as many as we can find that have pages somewhere?
I.e., people can add theirs there; others can back track through history
and add them