How many hours is CST behind NZDT?
As abbreviations, NZDT is always 19 hours ahead of CST: CST is UTC−6 and NZDT is UTC+13. To convert, add 19 hours.
When the CST to NZDT time difference changes
For most of the year NZDT is 17 hours ahead of CST. From 1 November to 31 December 2026, NZDT is 19 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 | NZDT vs CST | Length |
|---|---|---|
| 1 November 2026 to 31 December 2026 | 19 hours ahead | 61 days |
| 1 January 2027 to 13 March 2027 | 19 hours ahead | 72 days |
| 14 March 2027 to 3 April 2027 | 18 hours ahead | 21 days |
| 4 April 2027 to 25 September 2027 | 17 hours ahead | 175 days |
| 26 September 2027 to 6 November 2027 | 18 hours ahead | 42 days |
| 7 November 2027 to 31 December 2027 | 19 hours ahead | 55 days |
Best time for a meeting between CST and NZDT
- When NZDT 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 NZDT is 19 hours ahead of CST: no shared 09:00 to 17:00 hours; one side has to take the call outside office hours.
- When NZDT is 18 hours ahead of CST: no shared 09:00 to 17:00 hours; one side has to take the call outside office hours.