Highlighted rows fall within 09:00–18:00 in both places: 4 shared working hours.
How many hours is CST ahead of SST?
As abbreviations, SST is always 5 hours behind of CST: CST is UTC−6 and SST is UTC−11. To convert, subtract 5 hours.
When the CST to SST time difference changes
For most of the year SST is 6 hours behind of CST. From 1 November to 31 December 2026, SST is 5 hours behind of CST instead, because the two places change their clocks on different dates. Meetings booked by the usual gap land an hour off in those weeks.
Dates
SST vs CST
Length
1 November 2026 to 31 December 2026
5 hours behind
61 days
1 January 2027 to 13 March 2027
5 hours behind
72 days
14 March 2027 to 6 November 2027
6 hours behind
238 days
7 November 2027 to 31 December 2027
5 hours behind
55 days
When CST and SST are both at work
When SST is 6 hours behind of CST: 2 shared office hours, 15:00 to 17:00 in CST (09:00 to 11:00 in SST).
When SST is 5 hours behind of CST: 3 shared office hours, 14:00 to 17:00 in CST (09:00 to 12:00 in SST).
Frequently asked questions about CST and SST time
How many hours ahead is SST of CST?
SST (UTC−11) is 5 hours behind of CST (UTC−6).
Does the time difference between CST and SST change?
Yes. It is usually 6 hours behind, but changes when one side moves its clocks: 5 hours behind from 1 November to 31 December 2026; 5 hours behind from 1 January to 13 March 2027.