Opens at daylight.
I don't think they have an official time.
Most venders open at 8 a.m.
There are many different entities operating portions of what is considered First Monday Trade Days. The City of Canton operates the original portion of the grounds and they claim their portion is open from sun-up to sun-down. In reality, 7am is a good starting point and they wrap up around 5pm except on Sunday when they open all the gates at 4pm for vehicles picking up merchandise and vendors packing up.
Venders usually start setting up on Thursday or Friiday prior to the 1st Monday of the month and they sale all weekend. Most of the venders get ready to or leave Sunday afternoon or evening. They usually open for business at about 7am.
They're not going to turn down $5 for you to park so when you get there they'll take your money
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