Winter UTC Offsets at 22 Busy Airports, Until the Clocks Change
The clocks have settled. Europe fell back on October 25 and the United States and Canada on November 1, so the northern hemisphere is on standard time and the gaps between cities hold steady for the next four months. Here are the UTC offsets at 22 busy airports for the winter, the gaps between the city pairs people ask about most, and the dates in spring when it all moves again.
UTC Offsets This Winter
Hours ahead of (+) or behind (−) UTC, which pilots call Zulu. The last two columns show the next change in 2027 and the offset after it. Tap an airport code for its live local time.
| Airport | Now | Next change | Then |
|---|---|---|---|
| ATL Atlanta | −5 | Mar 14 | −4 |
| JFK New York JFK | −5 | Mar 14 | −4 |
| YYZ Toronto Pearson | −5 | Mar 14 | −4 |
| ORD Chicago O'Hare | −6 | Mar 14 | −5 |
| DFW Dallas/Fort Worth | −6 | Mar 14 | −5 |
| MEX Mexico City | −6 | No change | — |
| DEN Denver | −7 | Mar 14 | −6 |
| PHX Phoenix Sky Harbor | −7 | No change | — |
| LAX Los Angeles | −8 | Mar 14 | −7 |
| ANC Anchorage | −9 | Mar 14 | −8 |
| HNL Honolulu | −10 | No change | — |
| GRU São Paulo | −3 | No change | — |
| LHR London Heathrow | +0 | Mar 28 | +1 |
| CDG Paris Charles de Gaulle | +1 | Mar 28 | +2 |
| FRA Frankfurt | +1 | Mar 28 | +2 |
| IST Istanbul | +3 | No change | — |
| DXB Dubai | +4 | No change | — |
| DEL Delhi | +5:30 | No change | — |
| SIN Singapore | +8 | No change | — |
| HND Tokyo Haneda | +9 | No change | — |
| SYD Sydney | +11 | Apr 4 | +10 |
| AKL Auckland | +13 | Apr 4 | +12 |
Sydney and Auckland are on summer time now, which is why their numbers go down in April while everyone else's go up in March.
The Gaps Between City Pairs
These hold from now until the first spring change.
| Pair | Gap this winter | In spring 2027 |
|---|---|---|
| London and New York | 5 hours | 4 hours, Mar 14 to 27 |
| Paris and New York | 6 hours | 5 hours, Mar 14 to 27 |
| New York and Los Angeles | 3 hours | No change |
| London and Dubai | 4 hours | 3 hours from Mar 28 |
| London and Delhi | 5 hours 30 min | 4 hours 30 min from Mar 28 |
| New York and Tokyo | 14 hours | 13 hours from Mar 14 |
| Los Angeles and Tokyo | 17 hours | 16 hours from Mar 14 |
| London and Sydney | 11 hours | 10 hours from Mar 28, 9 from Apr 4 |
The Next Odd Weeks
- US and Canada: Sunday, March 14, 2027. Each time zone springs forward at 2:00 a.m. local time.
- UK and Europe: Sunday, March 28, 2027. Everyone on European time moves at 01:00 UTC.
- Sydney and Auckland: Sunday, April 4, 2027. They fall back an hour as their summer ends.
The fall mismatch lasted one week. The spring one lasts two: from March 14 to March 27, North America has already moved and Europe hasn't, so transatlantic gaps are an hour shorter than the table above. If you have a standing call or a regular flight across the Atlantic, that's the fortnight to double-check. Our fall clocks-change guide walks through what tends to go wrong in a week like that.
Places That Never Move
Phoenix, Honolulu, Mexico City, São Paulo, Istanbul, Dubai, Delhi, Singapore, and Tokyo keep one offset all year. Their gap to you changes only when your own clocks do. Zulu doesn't move either, which is why aviation writes its schedules, weather, and NOTAMs in it. Zulu time explained has the longer version.
Letting AvClock Keep Track
AvClock reads every airport's local time from the same time zone database your iPhone uses, so each of the changes above happens on its own, on the right day for that airport. Local time and Zulu stay pinned at the top of the list.
Save the airports you deal with and open Overlap. The green columns show the hours that work for everyone, on your own clock, and they shift on their own when March comes. Overlap is free.
AvClock is reference and informational only, not for actual flight planning or navigation. Always confirm departure and arrival times with your airline and official sources. Dates and offsets above are from the IANA time zone database as of November 2026; governments occasionally change their rules.