AT — Atlantic Time Zone: Atlantic Time is GMT/UTC -4h during Standard Time and -3h during Daylight Saving Time.
ET — Eastern Time Zone: Eastern Time is GMT/UTC -5h during Standard Time and -4h during Daylight Saving Time.
CT — Central Time Zone: Central Time is GMT/UTC -6h during Standard Time and -5h during Daylight Saving Time.
MT — Mountain Time Zone: Mountain Time is GMT/UTC -7h during Standard Time and -6h during Daylight Saving Time.
PT — Pacific Time Zone: Pacific Time is GMT/UTC -8h during Standard Time and -7h during Daylight Saving Time.
AKT — Alaska Time Zone: Alaska Time is GMT/UTC -9h during Standard Time and -8h during Daylight Saving Time.
HT — Hawaii Time Zone: Hawaii Time is GMT/UTC -10h during Standard Time and Hawaii does not observe Daylight Saving Time.
