GMT to CST converter
CST is usually 5 h behind GMT. It is 6 h behind GMT 1 Jan–8 Mar and 1 Nov–31 Dec 2026, because of daylight saving time.
GMT to CST table
For 5 July 2026, when CST is 5 h behind GMT. Other dates: see the table on the right.
| GMT | CST |
|---|---|
| 12:00 AM | 7:00 PM prev. day |
| 1:00 AM | 8:00 PM prev. day |
| 2:00 AM | 9:00 PM prev. day |
| 3:00 AM | 10:00 PM prev. day |
| 4:00 AM | 11:00 PM prev. day |
| 5:00 AM | 12:00 AM |
| 6:00 AM | 1:00 AM |
| 7:00 AM | 2:00 AM |
| 8:00 AM | 3:00 AM |
| 9:00 AM | 4:00 AM |
| 10:00 AM | 5:00 AM |
| 11:00 AM | 6:00 AM |
| 12:00 PM | 7:00 AM |
| 1:00 PM | 8:00 AM |
| 2:00 PM | 9:00 AM |
| 3:00 PM | 10:00 AM |
| 4:00 PM | 11:00 AM |
| 5:00 PM | 12:00 PM |
| 6:00 PM | 1:00 PM |
| 7:00 PM | 2:00 PM |
| 8:00 PM | 3:00 PM |
| 9:00 PM | 4:00 PM |
| 10:00 PM | 5:00 PM |
| 11:00 PM | 6:00 PM |
When the difference changes
Computed from the IANA tz database (release 2026c). Governments can change these rules; the live converter uses your browser’s own copy of the database.
| 2026: from (UTC) | until (UTC) | CST vs GMT |
|---|---|---|
| 1 January 2026 | 8 March 2026 | 6 h behind |
| 8 March 2026 | 1 November 2026 | 5 h behind |
| 1 November 2026 | 31 December 2026 | 6 h behind |
| 2027: from (UTC) | until (UTC) | CST vs GMT |
|---|---|---|
| 1 January 2027 | 14 March 2027 | 6 h behind |
| 14 March 2027 | 7 November 2027 | 5 h behind |
| 7 November 2027 | 31 December 2027 | 6 h behind |
GMT: Greenwich Mean Time · GMT time now
GMT here means the fixed UTC+0 offset. The UK only uses GMT in winter; in summer London is on BST (UTC+1).
CST: Central Time · CST time now
CST is also used for China Standard Time (UTC+8) and Cuba Standard Time. This page means US Central Time (America/Chicago), which switches to CDT (UTC−5) in summer.
Related converters
Questions
What is the time difference between GMT and CST?
CST is usually 5 h behind GMT. It is 6 h behind GMT 1 Jan–8 Mar and 1 Nov–31 Dec 2026, because of daylight saving time.
What is 9 am GMT in CST?
9:00 am GMT is 4:00 AM CST, on dates when the usual difference applies. Use the converter above for any specific date.
Which GMT does this page use?
GMT here means the fixed UTC+0 offset. The UK only uses GMT in winter; in summer London is on BST (UTC+1).
Which CST does this page use?
CST is also used for China Standard Time (UTC+8) and Cuba Standard Time. This page means US Central Time (America/Chicago), which switches to CDT (UTC−5) in summer.