Day Length Calculator: Hours of Daylight Today

Measure today’s daylight span from sunrise to sunset, compare night length, and see how tomorrow’s daylight will grow or shrink.

Live Day Length

Daylight vs Night — New York Reference

Daylight 14h 7m 0s (58.8%) Night 9h 53m 0s
Sunrise
05:58 AM
Sunset
08:05 PM
Change Tomorrow
-2m 0s daylight tomorrow
Global Comparison

Today’s Day Length Around the World

CitySunriseSunsetDay Length
Singapore 07:06 AM 07:15 PM 12h 9m 0s Open
New York 05:58 AM 08:05 PM 14h 7m 0s Open
London 05:33 AM 08:39 PM 15h 6m 0s Open
Reykjavik* 04:52 AM 10:14 PM 17h 22m 0s Open

*Reykjavik shown as a high-latitude reference; browse the cities directory for full city pages.

How Day Length Works

Day length answers a simple question with precise astronomy behind it: how long is the Sun above the horizon today? We measure from official sunrise to official sunset — not from civil dawn to civil dusk. That distinction matters for schedules, solar energy estimates, and outdoor planning, because twilight can add well over an hour of usable light beyond the day-length figure.

Latitude Is the Amplifier

Near the Equator, day length stays close to 12 hours all year. At mid-latitudes it can swing from roughly 8–9 hours in winter to 15–16 hours in summer. Inside the polar circles, day length can collapse to zero (polar night) or expand to 24 hours (midnight sun).

New York Seasonal Extremes (2026 overview)

On the 1st of each month in our New York reference series, the longest sample day falls around July (15h 3m 0s) and the shortest around January (9h 19m 0s). Open any city page for a full 12-month table for that exact location.

Continue with solstices & equinoxes, the twilight calculator, or our guide on why day length changes.

Day Length Frequently Asked Questions

Day length is the duration between official sunrise and official sunset at a given location and date. It does not include twilight before sunrise or after sunset.
Earth’s 23.5° axial tilt and its orbit around the Sun change the Sun’s path across your sky, so the time between sunrise and sunset lengthens or shortens through the seasons.
Around the summer solstice for your hemisphere — roughly June 21 in the Northern Hemisphere and December 21 in the Southern Hemisphere.
Nearly, but not exactly. Atmospheric refraction and the Sun’s apparent disk make most places slightly longer than 12 hours of daylight even on equinox dates.
Use this calculator’s reference panel, search your city from the site header, or open any city page for today’s day length plus a monthly overview.