the United States spans 7 time zones, and this guide covers them all: the offset in each city, the daylight saving dates, the best time to call from New York or London, and how to convert any time. The 14 major cities covered here are New York, Los Angeles, Chicago, San Francisco, Boston, Miami, Atlanta, Houston, Dallas, Seattle, Denver, Phoenix, Honolulu, Anchorage.
Try the tool: World Clock — see the current time in every city in the United States, with the date and the offset.
Time zones in the United States
| City | IANA time zone | Offset in January 2026 | Offset in July 2026 | Daylight saving? |
|---|---|---|---|---|
| New York | America/New_York | UTC−05:00 | UTC−04:00 | Yes |
| Los Angeles | America/Los_Angeles | UTC−08:00 | UTC−07:00 | Yes |
| Chicago | America/Chicago | UTC−06:00 | UTC−05:00 | Yes |
| San Francisco | America/Los_Angeles | UTC−08:00 | UTC−07:00 | Yes |
| Boston | America/New_York | UTC−05:00 | UTC−04:00 | Yes |
| Miami | America/New_York | UTC−05:00 | UTC−04:00 | Yes |
| Atlanta | America/New_York | UTC−05:00 | UTC−04:00 | Yes |
| Houston | America/Chicago | UTC−06:00 | UTC−05:00 | Yes |
| Dallas | America/Chicago | UTC−06:00 | UTC−05:00 | Yes |
| Seattle | America/Los_Angeles | UTC−08:00 | UTC−07:00 | Yes |
| Denver | America/Denver | UTC−07:00 | UTC−06:00 | Yes |
| Phoenix | America/Phoenix | UTC−07:00 | UTC−07:00 | No |
| Honolulu | Pacific/Honolulu | UTC−10:00 | UTC−10:00 | No |
| Anchorage | America/Anchorage | UTC−09:00 | UTC−08:00 | Yes |
The spread across the United States is 5 hours in January — the difference between the easternmost and westernmost zones. That matters when you schedule inside the country: a meeting at 9am in the east can be 6am in the west, and a national broadcast or a train timetable has to pick a time that works across the spread. The table above gives the offset for each city, so you can convert between any two of them.
Daylight saving in the United States
New York, Los Angeles, Chicago, San Francisco, Boston, Miami, Atlanta, Houston, Dallas, Seattle, Denver, Anchorage observe daylight saving; Phoenix, Honolulu do not. The 2026 dates for the zones that change:
| Time zone | Daylight saving starts 2026 | Daylight saving ends 2026 |
|---|---|---|
| New York | Sunday, 8 March 2026 | Sunday, 1 November 2026 |
| Los Angeles | Sunday, 8 March 2026 | Sunday, 1 November 2026 |
| Chicago | Sunday, 8 March 2026 | Sunday, 1 November 2026 |
| San Francisco | Sunday, 8 March 2026 | Sunday, 1 November 2026 |
| Boston | Sunday, 8 March 2026 | Sunday, 1 November 2026 |
| Miami | Sunday, 8 March 2026 | Sunday, 1 November 2026 |
| Atlanta | Sunday, 8 March 2026 | Sunday, 1 November 2026 |
| Houston | Sunday, 8 March 2026 | Sunday, 1 November 2026 |
| Dallas | Sunday, 8 March 2026 | Sunday, 1 November 2026 |
| Seattle | Sunday, 8 March 2026 | Sunday, 1 November 2026 |
| Denver | Sunday, 8 March 2026 | Sunday, 1 November 2026 |
| Anchorage | Sunday, 8 March 2026 | Sunday, 1 November 2026 |
Phoenix: Arizona opted out of daylight saving in 1968, under the federal law that lets states exempt themselves. The reason is the desert heat: an extra hour of evening sun would mean an extra hour of air conditioning, not an extra hour outdoors. The Navajo Nation inside Arizona does observe it. Honolulu: Hawaii opted out of daylight saving in 1967, under the federal law that lets states exempt themselves. Hawaii's tropical latitude means day length barely changes, so there is nothing to gain.
What time is it in the United States when it is 12:00 UTC?
| City | Local time at 12:00 UTC (15 January 2026) |
|---|---|
| New York | 7:00 am |
| Los Angeles | 4:00 am |
| Chicago | 6:00 am |
| San Francisco | 4:00 am |
| Boston | 7:00 am |
| Miami | 7:00 am |
| Atlanta | 7:00 am |
| Houston | 6:00 am |
| Dallas | 6:00 am |
| Seattle | 4:00 am |
| Denver | 5:00 am |
| Phoenix | 5:00 am |
| Honolulu | 2:00 am |
| Anchorage | 3:00 am |
How to convert a time to the United States
Take 3pm in London. In January, London is UTC+00:00 and New York is UTC−05:00, so 3pm in London is 10:00 am in New York. In July, London is UTC+01:00 and New York is UTC−04:00, so 3pm in London is 10:00 am in New York. The answer changes between January and July, because one or both places move their clocks — always check the offset for the date you care about. The time zone converter does this for any two cities and any date, and the UTC converter converts from UTC.
The best time to call the United States
The overlap of a 9am–5pm working day between New York and New York is 8 hours in January 2026; between New York and London it is 3 hours. The best time to call is mid-morning in the city further east and late morning in the city further west — the overlap of the two best parts of the day. The meeting planner shows the overlap for any set of cities.
The time in the United States through the year
The offset of New York month by month in 2026 — the local time when it is 12:00 UTC on the 15th of each month:
| Month | UTC offset | Local time at 12:00 UTC |
|---|---|---|
| January | UTC−05:00 | 7:00 am |
| February | UTC−05:00 | 7:00 am |
| March | UTC−04:00 | 8:00 am |
| April | UTC−04:00 | 8:00 am |
| May | UTC−04:00 | 8:00 am |
| June | UTC−04:00 | 8:00 am |
| July | UTC−04:00 | 8:00 am |
| August | UTC−04:00 | 8:00 am |
| September | UTC−04:00 | 8:00 am |
| October | UTC−04:00 | 8:00 am |
| November | UTC−05:00 | 7:00 am |
| December | UTC−05:00 | 7:00 am |
New York changes its offset during the year, because it observes daylight saving: the offset moves by one hour at the spring change and back at the autumn change, and the months in between are on the other offset. The table shows exactly which months are on which offset. The world clock for New York shows the live time and the offset in effect today.
the United States and the rest of the world
The time difference from New York to six major cities, in January and in July 2026:
| City | Difference in January | Difference in July |
|---|---|---|
| New York | the same time | the same time |
| London | 5 hours behind | 5 hours behind |
| Paris | 6 hours behind | 6 hours behind |
| Tokyo | 14 hours behind | 13 hours behind |
| Sydney | 16 hours behind | 14 hours behind |
| Dubai | 9 hours behind | 8 hours behind |
The differences change between January and July wherever one of the two cities observes daylight saving and the other does not — or wherever they change on different dates. The time zone converter gives the difference for any date, so a conversion done for January is not reused for July without checking.
Calling the United States from London
In January, the working hours of New York and London overlap between 2:00 pm and 5:00 pm London time — that is the window in which a call falls inside both working days. The best time inside the window is usually the middle of it, when both sides are mid-morning or early afternoon rather than at the edge of the working day. Outside the window, one side is either not yet at work or already finished, so the call has to be early morning or late evening for someone.
Neighbouring time zones
Other major cities in the Americas, for comparison:
| City | Country | Offset in January 2026 |
|---|---|---|
| Toronto | Canada | UTC−05:00 |
| São Paulo | Brazil | UTC−03:00 |
| Mexico City | Mexico | UTC−06:00 |
| Buenos Aires | Argentina | UTC−03:00 |
| Vancouver | Canada | UTC−08:00 |
| Montreal | Canada | UTC−05:00 |
| Santiago | Chile | UTC−03:00 |
| Lima | Peru | UTC−05:00 |
Frequently asked questions
How many time zones does the United States have?
7 — the cities covered here use America/New_York, America/Los_Angeles, America/Chicago, America/Denver, America/Phoenix, Pacific/Honolulu, America/Anchorage. The table above gives the offset for each city in January and July.
What is the time zone of New York?
New York is on America/New_York, UTC−05:00 from UTC in January and UTC−04:00 in July. The world clock for New York shows the live time.
Does the United States observe daylight saving?
Partly: New York, Los Angeles, Chicago, San Francisco, Boston, Miami, Atlanta, Houston, Dallas, Seattle, Denver, Anchorage observe it, and Phoenix, Honolulu do not.
What time is it in New York when it is 12:00 UTC?
7:00 am on 15 January 2026 — New York is UTC−05:00 from UTC in winter.
What is the best time to call the United States from London?
The overlap of working hours between New York and London is 3 hours in January. Mid-morning in the city further east is usually the kindest time — use the meeting planner to check.
How do I convert a time to the United States?
Find the offset for the city and the date — the table above gives January and July — and add it to the UTC time, or use the time zone converter to convert between any two cities directly.
Related pages
- What time is it in New York?
- What time is it in Los Angeles?
- What time is it in Chicago?
- What time is it in San Francisco?
- Time Zone Converter
- World Clock
- UTC Converter
- Daylight saving time 2026 dates
Sources
- IANA Time Zone Database, via Node.js Intl (
Intl.DateTimeFormatwithtimeZone) — offsets, daylight saving dates and local times in this article were worked out from the IANA database, not typed from memory. - TimeFlow's own time-zone data (
data/cities.ts,data/dst.ts), computed from the IANA database. - Time zone rules and offsets: the IANA Time Zone Database, as applied by this site's tools. Offsets and daylight saving dates on this page are computed from the database for the dates stated.
- TimeFlow's world clock and time zone converter — the live tools behind the numbers on this page.
- Time-zone and daylight saving rules are set by governments and can change. For flights, deadlines and meetings that cannot move, confirm the time with an official source.