Chatham Standard Time Zone
During summer daylight saving time is observed and clocks are advanced one hour. Chatham Daylight Time (CHADT) is 13 hours 45 minutes ahead of UTC, 45 minutes ahead of New Zealand Daylight Time (NZDT). Currently daylight saving time runs from the last Sunday in September to the first Sunday in April.
- "Time Act 1974". legislation.govt.nz. New Zealand Parliamentary Counsel Office/Te Tari Tohutohu Pāremata. 30 March 1987. Retrieved 12 September 2020.