Maybe they optimize their database or do whatever behind the scenes data stuff on the weekends, and then once the database is optimized they can run the EDD algorithms.
Sorry but I literally LOL'd at this
I'm pretty convinced these dates are just random things in some excel spreadsheet that an intern updates now and then.
Also, I don't believe the BS about chip shortages. Fake white pleather doesn't have a chip inside of it. It's clearly a supply issue, and is shocking that they can't seem to come up with a decent estimate for delivery dates.
Also no date change for me.