Does anyone know the date for the "Not Your Keys, Not Your Coins" withdrawel of crypto from all exchanges?  I seem to remember this being a thing.  Once a year everyone withdrew all their crypto off the exchanges to prove that the exchanges were being honest or if they weren't to rat them out.  I have googled and googled and cannot find a thing on this.  But I know it WAS a thing at one time.  Maybe not so much anymore but I would love to document the historical event.  I know it was an annual thing.  I'd really like the actual date that was set and used.  I'm thinking it might have been Bitcoins birthday, January 3?  But I want to be sure I document it properly if I am going to document it.