I just wanted to let everyone know that as a baby step towards ramping up promotion of the events in the coming days, there is now a watchlist notice (i.e. for logged in users only) on English Wikipedia.[1]
English Wikipedians also are using MediaWiki:Geonotice.js to do geo-targeted watchlist notices for events in Washington D.C., Miami, and New York City.[2]
I would strongly encourage anyone interested to do the same for their events. I'll be sending a list update about how we can plan for using CentralNotice (i.e. banners for all visitors to Wikimedia projects) in collaboration with the fundraising team here at the Foundation. But in the meantime, watchlist notices require almost no work, just a basic consensus on the talk page of those MediaWiki message pages.