There is a change this year that affects deer licenses bought after the season begins in Minnesota.   In the past, if a hunter purchased a license after the season had already began, they needed to wait two days to hunt.  This year that rule has been changed. 

A deer hunting license purchased after a season opener is valid the same day of purchase if purchased prior to legal shooting hours.

According to Steve Merchant, wildlife populations and regulations manager, "The language is unclear in the 2015 Minnesota Hunting and Trapping Regulations Handbook about when deer hunting licenses are valid, so we want to elaborate on this."

You can read more about this and any other pertinent information at the DNR's website.