Cuba Standard Time (CST) is 5 hours behind Coordinated Universal Time (UTC). This time zone is in use during standard time in: Caribbean.
See full time zone map
Summer Time & DST
Some places observe daylight saving time/summer time during the summer, and therefore use CDT (Cuba Daylight Time) in the summer.
Where and When is CST Observed?
Caribbean countries using CST in the winter and CDT in the summer:
Other Time Zones in UTC -5
Some time zones exist that have the same offset as CST, but can be found under a different name: