Highlighted rows fall within 09:00–18:00 in both places: 1 shared working hour.
How many hours is CST behind ChST?
As abbreviations, ChST is always 16 hours ahead of CST: CST is UTC−6 and ChST is UTC+10. To convert, add 16 hours.
When the CST to ChST time difference changes
For most of the year ChST is 15 hours ahead of CST. From 1 November to 31 December 2026, ChST is 16 hours ahead 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
ChST vs CST
Length
1 November 2026 to 31 December 2026
16 hours ahead
61 days
1 January 2027 to 13 March 2027
16 hours ahead
72 days
14 March 2027 to 6 November 2027
15 hours ahead
238 days
7 November 2027 to 31 December 2027
16 hours ahead
55 days
Calling hours for CST and ChST
When ChST is 15 hours ahead of CST: no shared 09:00 to 17:00 hours; try 17:00 in CST (08:00 in ChST).
When ChST is 16 hours ahead of CST: no shared 09:00 to 17:00 hours; try 17:00 in CST (09:00 in ChST).
Frequently asked questions about CST and ChST time
How many hours ahead is ChST of CST?
ChST (UTC+10) is 16 hours ahead of CST (UTC−6).
Does the time difference between CST and ChST change?
Yes. It is usually 15 hours ahead, but changes when one side moves its clocks: 16 hours ahead from 1 November to 31 December 2026; 16 hours ahead from 1 January to 13 March 2027.