New Zealand has mainly two different time zones. The time zone followed in the main islands is the New Zealand Standard time zone. This is twelve hours advanced of the coordinated universal time zone. Another time that is followed in the Chatam Islands is the Chatham Standard time and this is 12 hours and forty five minutes advanced to the coordinated universal time.
There is a day light saving system in the summer and during this period; the clocks are advanced one hour. This will make the New Zealand daylight time to be thirteen hours ahead and Chatham daylight time to be 13 hours and 45 minutes ahead of UTC. This country is considered to be the first one to adopt a standard time and this happened in the year 1868. Since then they are maintaining a time zone that is observed nationally.
The standard time zone was based on the 172 degree 30 minutes longitude and this was 11.5 hours ahead of the GMT. This standard time followed in New Zealand was known as the New Zealand Mean time. Measurements standards Laboratory is responsible for maintaining the standard for time in this country. This is done with the help of time pips broadcast, the speaking clock service and the Network Time Protocol.