New Zealand uses New Zealand Standard Time (NZST), which is UTC+12 hours during the winter, and New Zealand Daylight Time (NZDT), which is UTC+13 hours during the summer.

Yes, New Zealand observes Daylight Saving Time. Clocks move forward 1 hour to New Zealand Daylight Time (NZDT, UTC+13) in late September and move back 1 hour to New Zealand Standard Time (NZST, UTC+12) in early April.

The time difference between New Zealand and the United States varies depending on the U.S. time zone. For example, New Zealand is 17 hours ahead of Eastern Standard Time (EST) and 20 hours ahead of Pacific Standard Time (PST).

New Zealand shares its time zone (NZST/NZDT) with some other Pacific Islands, such as the Chatham Islands, which use a variant time zone (CHAST/CHADT), UTC+12:45/UTC+13:45.