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So im wondering and lets for example say that for the school i want to go to:

Application deadline is April 15
Priority deadline for financial aid is March 2
Deadline for scholarship info is April 1
and they begin reviewing applications in December

What i am wondering is.. when is early.. when is normal? If i apply April 15 will my chances of being accepted based on normal school's statistics be altered? Or should i turn my application in prior to December? During December? Do any of these things make a difference?

This is a normal timeline.

Early is October-November. (Remember, they're on a rolling basis, more than likely, so the sooner-- the better).

Normal is like December/January

Late is anything past January 31.