UTC to NZST Converter

Daylight time covers more than half the year, so for most dates the offset you want is UTC+13, not UTC+12. The clocks move forward at 2:00 AM on the September date and back at 3:00 AM on the April date, in the southern spring and autumn.

These rules apply to the North and South Islands. The Chatham Islands, a small territory to the east, keep their own time, 45 minutes ahead of the main islands (UTC+12:45 on standard time and UTC+13:45 on daylight time).

New Zealand is so far ahead that its morning belongs to the previous UTC date. A log entry stamped 21:00 UTC on Monday is already 9:00 AM on Tuesday in New Zealand on NZST. If you are matching UTC timestamps to a New Zealand team's working day, the date is the part that goes wrong, not the hour.

Many calendars and logs label New Zealand time as NZST all year. In summer that is wrong by an hour. 09:00 UTC is 9:00 PM on NZST but 10:00 PM on NZDT, and a message that says “9:00 PM NZST” on a summer date puts the meeting an hour early.

The safe habit is to name the city (Auckland or Wellington) and, if the time is going into code, use the IANA zone Pacific/Auckland, which applies the right offset for each date. The live clock above does exactly that and shows which of the two names is in use right now.