Being that the Eastern Market opens to the public at 7a.m., I would imagine probably a couple of hours before that. If you go on the Eastern Market website, there is an application that must be completed and then approved before you can be a vendor there. Hope this helps.
5 am is when different pple come so any time after that.
I really can't answer that question, however I'm sure it would be quite early as I've seen numerous trucks and cars there hours prior to market opening.
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