How many hours is CST behind AEDT?
As abbreviations, AEDT is always 17 hours ahead of CST: CST is UTC−6 and AEDT is UTC+11. To convert, add 17 hours.
When the CST to AEDT time difference changes
For most of the year AEDT is 15 hours ahead of CST. From 1 November to 31 December 2026, AEDT is 17 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 | AEDT vs CST | Length |
|---|---|---|
| 1 November 2026 to 31 December 2026 | 17 hours ahead | 61 days |
| 1 January 2027 to 13 March 2027 | 17 hours ahead | 72 days |
| 14 March 2027 to 3 April 2027 | 16 hours ahead | 21 days |
| 4 April 2027 to 2 October 2027 | 15 hours ahead | 182 days |
| 3 October 2027 to 6 November 2027 | 16 hours ahead | 35 days |
| 7 November 2027 to 31 December 2027 | 17 hours ahead | 55 days |
Best time for a meeting between CST and AEDT
- When AEDT is 15 hours ahead of CST: no shared 09:00 to 17:00 hours; try 17:00 in CST (08:00 in AEDT).
- When AEDT is 17 hours ahead of CST: no shared 09:00 to 17:00 hours; one side has to take the call outside office hours.
- When AEDT is 16 hours ahead of CST: no shared 09:00 to 17:00 hours; try 17:00 in CST (09:00 in AEDT).