The sticker on the door jam with the VIN usually has the month and year. The VIN has an indicator for which factory it was built in. You may find rumors/wisdo

The sticker on the door jam with the VIN usually has the month and year. The VIN has an indicator for which factory it was built in. You may find rumors/wisdom/witchcraft around one factory having better quality controls compared to another. Which day of the week your car was "Manufactured" probably isn't a thing that even makes sense. That's just going to be final assembly. Each individual part will of course been manufactured on a different day. Even if you believed the magic of Tuesday is the best day, do you want to know the day your doors were hung on the hinges, or the day the pistons were machined?