The record label I help out has a ton of releases. There are over 60 of them. I've been trying to get all the metadata correct on all the albums. The year is easy to sort out but the actual day is very tough to find.

My temporary solution was to just use Jan 01 until I find them. I've been noticing as I add what albums I listen to that there are a lot of Jan 01 releases in Apple Music.

Looks like great minds think a like. Jan 01 must be the universal date for "I give up trying to track down the release date".