Pacific Standard Time - PST (GMT-8)
Pacific Daylight Time - PDT (GMT-7)
Mountain Standard Time - MST (GMT-7)
Mountain Daylight Time - MDT (GMT-6)
Central Standard Time - CST (GMT-6)
Central Daylight Time - CDT (GMT-5)
Eastern Standard Time - EST (GMT-5)
Eastern Daylight Time - EDT (GMT-4)