Convert any time between ET and NZDT, with a full 24-hour table and the hours when both sides are actually at work.

ET to NZDT Time Converter

NZDT is 17 hours ahead of ET. The US East Coast is currently on EDT (UTC-4:00), and NZDT is UTC+13:00.

Worth knowing right now. The US East Coast is currently on EDT, not ET, because daylight saving is in effect. The 17 hours above is the gap between those two regions today, which is almost certainly what you want. Taken strictly as written, ET to NZDT is 18 hours.
ET
Eastern Time
01:02:37 PM
Sunday, October 11, 2026
UTC-4:00
+17:00
hours difference
⇆ Reverse
NZDT
New Zealand Daylight Time
06:02:37 AM
Monday, October 12, 2026
UTC+13:00

Best Time to Call Between ET and NZDT

Both zones are inside normal business hours between 4:00 PM and 5:00 PM ET — that's 9:00 AM to 10:00 AM NZDT. That's a 1-hour window.

both at work ET only NZDT only neither  —  hours along the strip are ET.

ET to NZDT: Full 24-Hour Conversion Table

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

ETNZDTWorking hours
12:00 AM 5:00 PM —
1:00 AM 6:00 PM —
2:00 AM 7:00 PM —
3:00 AM 8:00 PM —
4:00 AM 9:00 PM —
5:00 AM 10:00 PM —
6:00 AM 11:00 PM —
7:00 AM 12:00 AM next day —
8:00 AM 1:00 AM next day —
9:00 AM 2:00 AM next day ET only
10:00 AM 3:00 AM next day ET only
11:00 AM 4:00 AM next day ET only
12:00 PM 5:00 AM next day ET only
1:00 PM 6:00 AM next day ET only
2:00 PM 7:00 AM next day ET only
3:00 PM 8:00 AM next day ET only
4:00 PM 9:00 AM next day Both zones
5:00 PM 10:00 AM next day NZDT only
6:00 PM 11:00 AM next day NZDT only
7:00 PM 12:00 PM next day NZDT only
8:00 PM 1:00 PM next day NZDT only
9:00 PM 2:00 PM next day NZDT only
10:00 PM 3:00 PM next day NZDT only
11:00 PM 4:00 PM next day NZDT only

What ET and NZDT Actually Are

ET — Eastern Time

New York, Toronto, Washington DC, Atlanta, Miami, Boston. Standing at UTC-5:00 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, November 1, 2026, to EST.

Eastern Time covers roughly half the US population and, because of that, is the zone most American business defaults to when nobody specifies one.

NZDT — New Zealand Daylight Time

Auckland, Wellington, Christchurch in the southern summer. Standing at UTC+13:00 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 daylight time runs late September to early April, and the Chatham Islands keep their own clock 45 minutes ahead of the mainland throughout.

What This Means in Practice

The date changes mid-working-day

For 8 of the eight hours in a normal ET working day, the equivalent NZDT time falls on a different calendar date. Anything scheduled in that stretch needs the date checked as well as the time, or a Tuesday call quietly becomes a Wednesday one at the other end.

Both sides change clocks, on different dates

Both regions observe daylight saving but do not switch on the same day, so for a week or two each spring and fall the gap between them is an hour different from the rest of the year. Those short windows are where recurring invitations quietly break.

Nearly opposite sides of the clock

At 17 hours apart, one side's morning is the other side's night. Handing work over at the end of a shift usually beats trying to get both parties in the same call.

Frequently Asked Questions

What is the time difference between ET and NZDT?

NZDT is 17 hours ahead of ET. That is the live figure. Taken strictly as written, the gap between ET and NZDT is 18 hours — the two differ because at least one of these regions is currently on daylight saving.

What is 9:00 AM ET in NZDT?

9:00 AM ET is 2:00 AM the next day NZDT.

What are the best hours to schedule a call between ET and NZDT?

Between 4:00 PM and 5:00 PM ET, which is 9:00 AM to 10:00 AM NZDT. Both sides are inside normal business hours through that window.

Does the difference between ET and NZDT change during the year?

Yes. Both regions observe daylight saving, and they do not switch on the same dates, so the gap shifts by an hour at least twice a year. The next clock change is on Sunday, November 1, 2026.

Converting between two time zones regularly? Bookmark this page — the clocks update live and the table follows daylight saving automatically.