Why it suddenly gets dark at 5 p.m. when the clocks go back
In 2026 the clocks went back on November 1. New York's sunset jumped from 5:54 p.m. to 4:52 p.m. overnight — the clock moved an hour; daylight lost two minutes.
On November 1, 2026, most of the United States set its clocks back one hour. The next evening, sunset in New York arrived at 4:52 p.m. instead of 5:54 p.m. It feels like winter arrived overnight. It did not: the day lost two minutes of daylight, and the clock lost an hour.
Those two numbers are the whole explanation, and they are worth separating, because one of them is a decision made by Congress and the other is set by the tilt of Earth’s axis.
What the clock actually did
Computed with this site’s solar algorithm, in each city’s local time:
| City | Sunset October 31 | Sunset November 1 | Sunrise October 31 | Sunrise November 1 | Daylight lost |
|---|---|---|---|---|---|
| New York | 5:54 p.m. | 4:52 p.m. | 7:24 a.m. | 6:26 a.m. | 2 min |
| Chicago | 5:46 p.m. | 4:45 p.m. | 7:21 a.m. | 6:22 a.m. | 2 min |
| Denver | 5:59 p.m. | 4:58 p.m. | 7:27 a.m. | 6:28 a.m. | 2 min |
| Seattle | 5:53 p.m. | 4:52 p.m. | 7:51 a.m. | 6:53 a.m. | 3 min |
| Anchorage | 6:01 p.m. | 4:58 p.m. | 9:24 a.m. | 8:27 a.m. | 6 min |
| Honolulu (no DST) | 5:56 p.m. | 5:55 p.m. | 6:33 a.m. | 6:34 a.m. | 1 min |
Honolulu is the control experiment. Hawaii does not observe daylight saving time, and its sunset moved by one minute. Everything else in the table moved by about an hour, and the difference between those two columns is the clock.
The sunrise column is the part people forget. The same change that took an hour off the evening gave it back to the morning: New York’s sunrise went from 7:24 a.m. to 6:26 a.m. Nothing was gained or lost. A fixed block of daylight slid an hour earlier on the clock face.
Why 5 p.m. and not 6 p.m.
Because the switch happens on November 1, by which point the days are already short. At 40 degrees north, late October gives roughly ten and a half hours of daylight. Put the middle of that block near noon and sunset lands around 6 p.m. on daylight time; subtract the hour and it lands around 5 p.m. on standard time.
Then it keeps going. In New York, sunset falls to about 4:30 p.m. in early December — the earliest of the year — before starting back the other way. So the week after the clocks change is not a one-day shock; it is the start of about five weeks during which the afternoons get darker every day. The mechanism behind that slower drift is the equation of time: solar noon itself moves later through November and December, by about nine minutes between December 1 and December 22.
That is also why the earliest sunset, the latest sunrise and the shortest day are three different dates. They do not line up, and the clock change is not one of them.
The spring change is the same trick in reverse
On March 14, 2027 the clocks go forward. Computed at the same coordinates:
| City | Sunset March 13 | Sunset March 14 | Sunrise March 13 | Sunrise March 14 |
|---|---|---|---|---|
| New York | 5:59 p.m. | 7:00 p.m. | 6:11 a.m. | 7:09 a.m. |
| Chicago | 5:53 p.m. | 6:55 p.m. | 6:06 a.m. | 7:04 a.m. |
| Seattle | 6:10 p.m. | 7:12 p.m. | 6:26 a.m. | 7:24 a.m. |
One hour later, in both columns, with daylight growing by about three minutes. The evening suddenly feels like summer; the morning suddenly feels like winter. This is the change that generates the annual argument about whether the whole exercise is worth it.
What is law and what is astronomy
Under the rule in effect since 2007, daylight saving time begins on the second Sunday in March and ends on the first Sunday in November, at 2 a.m. local time. Because the rule is a Sunday rather than a fixed date, the fall change moves between November 1 and November 7: it was November 1 in 2026 and will be November 7 in 2027.
Hawaii and most of Arizona opt out and stay on standard time year-round; the Navajo Nation in Arizona does observe the change. The U.S. territories do not observe it either. Those choices are statutory, not astronomical, and they are why a single national sunset time is impossible.
The astronomy underneath is much less eventful. Day length at 40 degrees north is shrinking by two to three minutes a day in early November, on its way to the solstice. The Sun does not know what the clock says.
If you want the actual numbers for your own date
The sunrise and sunset tool computes rise, solar noon, set and day length for sixteen cities and any date you pick, in local time. It handles the polar cases too: in Longyearbyen in November the table says the Sun does not rise, which is a fact about latitude and not about anyone’s clock.
All clock times in the tables above were computed with this site’s solar algorithm and expressed in each city’s IANA time zone, so the daylight saving transition is applied by the time-zone database rather than by hand. The statutory dates, the 2 a.m. rule and the list of places that opt out are quoted from the sources listed above.
Frequently asked questions
- Why does sunset jump a full hour when the clocks change but the days barely change?
- Because sunset is a clock reading, not an event in the sky. On November 1, 2026 the United States moved from daylight time to standard time at 2 a.m., subtracting one hour from every clock time that followed. The Sun did what it does in early November: the day shortened by about two minutes. One hour of the jump is bookkeeping; the other two minutes are astronomy.
- When do the clocks change next?
- Daylight saving time resumes on March 14, 2027 and ends on November 7, 2027. Under the rule in effect since 2007 it starts on the second Sunday in March and ends on the first Sunday in November, always at 2 a.m. local time. That puts the end date anywhere from November 1 to November 7.
- Does the whole country get dark an hour earlier?
- No. Hawaii and most of Arizona stay on standard time all year, as do the U.S. territories, so their sunset times simply creep earlier by a minute or two a day. On the same two dates in 2026, Honolulu's sunset moved from 5:56 p.m. to 5:55 p.m. — one minute, with no clock change at all.
- Is the earliest sunset of the year the day the clocks go back?
- No. Sunset keeps getting earlier for another five weeks after the switch, because solar noon is drifting later through November and December. At 40 degrees north the earliest sunset lands around December 7, while the shortest day is December 22. Those are three separate dates, and the clock change is not one of them.
Sources
Each source is a primary or official reference, checked before publication. Links open the original.
- Time and Date, DST Ends in the US and Canada 2026 — November 1, 2026 for the fall change and March 14, 2027 for the spring change, plus the list of places that do not observe DST (timeanddate.com/news/time/usa-canada-end-dst-2026.html)
- U.S. Department of Transportation — daylight saving time is set by federal law, begins on the second Sunday in March and ends on the first Sunday in November (transportation.gov)
- Energy Policy Act of 2005, Public Law 109-58, section 110 — extended the daylight saving period to its current March-to-November window starting in 2007 (congress.gov)
- U.S. Naval Observatory, Rise/Set/Transit Times for One Day — used to check the computed sunrise and sunset times below against published tables (aa.usno.navy.mil/data/RS_OneDay)
- Meeus, Astronomical Algorithms, 2nd edition, chapter 15 — the 90.833 degree rise/set altitude that includes refraction and the solar disc's radius