what time zone is fort sill, ok
Central Standard Time - is abbreviated as CST. Central Daylight Time- is abbreviated as CDT. Fort Sill, Oklahoma is GMT/UTC - 6h during Standard Time. Fort Sill, Oklahoma is GMT/UTC - 5h during Daylight Saving Time. Fort Sill, Oklahoma does utilize Daylight Saving Time. Fort Sill, Oklahoma started Daylight Saving Time on.