is chicago cst time?
<answer> No, it is GMT/UTC - 6h during Standard Time and GMT/UTC - 5h during Daylight Saving Time. <context> Central Standard Time - is abbreviated as CST. Central Daylight Time- is abbreviated as CDT. Chicago, Illinois is GMT/UTC - 6h during Standard Time. Chicago, Illinois is GMT/UTC - 5h during Daylight Saving Time.