IST to NZST Time Converter

Common Times Converted

IST on the left, NZST on the right.

IST to NZST: Full 24-Hour Conversion Table

Shaded rows are working hours; the darker shade marks the hours when both zones are at work.

What IST and NZST Actually Are

IST — India Standard Time

Mumbai, Delhi, Bengaluru, Chennai, Kolkata, Hyderabad — and Colombo. Standing at UTC+5:30 as written, and the region does not change its clocks, so that offset holds all year. IST also stands for Irish Standard Time (UTC+1) and Israel Standard Time (UTC+2). This page covers the Indian one, which is by far the most searched.

India runs a single time zone across a country wide enough for two, which is why sunrise in the north-east can come nearly two hours before Mumbai's. Proposals for a second zone resurface regularly and have never been adopted.

NZST — New Zealand Standard Time

Auckland, Wellington, Christchurch. Standing at UTC+12:00 as written, and the region does change its clocks, so its live offset moves by an hour twice a year. The next change is on Sunday, April 4, 2027, to NZST. New Zealand moves to NZDT (UTC+13) from late September to early April.

New Zealand was the first country to formally adopt a nationwide standard time, in 1868, decades before the practice spread.

What This Means in Practice

Expect times on the half hour

IST sits on a 30-minute offset rather than a whole hour, so a round number on one side is never a round number on the other. A 9:00 meeting becomes 30 minutes past the hour, which is exactly the detail calendar invitations get wrong when someone converts in their head.

This gap is not fixed

NZST changes its clocks and IST does not, so the difference between them moves by an hour twice a year. A recurring meeting set now will drift for one side from Sunday, April 4, 2027 unless someone resets it.

Major Cities in Each Zone

Cities on IST

Cities on NZST