Brainstorming, during which brilliant ideas arise with such frequency and ferocity that correct spelling becomes unimportant as they are written down. (see also Maricrissing, the recording of minutes during a cerebrating session).
Pent up demand of celebrations unleashed after the delays from Covid. Often a birthday party or Baby shower that is happening well after the actual date of the occurrence.
I accidentally brought diapers to my friend's 30th birthday party as a gift, I guess I lost track of which party I was going to in the midst of Revenge Celebrating.