>4 hours ahead of Eastern Standard Time
Ah, but timing is everything.
4 hours only during Daylight Savings times of the year.
During standard times, shrinking in duration as it may be, that difference would normally be 5 hours.
6 if you're in Chicago.
8 if you're in LA.
The big winner is Phoenix where they don't do Mountain Daylight Time so it's a permanent 6.