Reminder. Most of America is observing daylight savings time, which means all our hours are pushed forward which makes it seem like GMT-5 is GMT-4, GMT-3 is GMT-2, etc. The last Sunday of October, we return to normal time, so the hours are changed.
Basically, if you don't observe daylight savings time, those shoes based at places that do observe daylight savings time will be pushed back an hour. Also, if you do observe daylight savings time, but you will still be on it after October, it will be pushed back 2 hours.
It's kinda complicated.