Geminids peak?

I am trying to book a trip in PA and need help confirming peak time. Everywhere says it peaks on Dec 14; does that mean the early morning of the 14 (aka go to bed on the 13th and wake up or stay up to see them)? Or does it mean stay up on the night of the 14th?

I guess my question basically is, if a meteor shower peaks on a certain day, does it mean the early morning hours of that date, or late night hours of that date? Hopefully this makes sense, thanks!