Sunrise & Sunset Calculator

Pick a US city and a date, and you'll see exact sunrise and sunset times along with the total span of daylight in between. Those times drive a lot of planning, from outdoor activities and photography to managing energy use, and the data extends into 2026 and past it. To put it in perspective, Seattle's longest day in 2026 lands on June 20, with roughly 16 hours of daylight, plenty of runway for a full-day trip outdoors.

The math rests on astronomical algorithms that combine the Earth's orbital parameters with the observer's latitude and longitude. We follow the United States Naval Observatory's (USNO) formulas, which fold in atmospheric refraction and the observer's elevation for high accuracy. The core step solves for the solar zenith angle, pinpointing when the center of the sun's disk crosses the horizon after adjusting for the standard 0.83 degrees of atmospheric refraction.

Raw astronomy can't see your horizon, so mountains and other local terrain may shift the sunrise or sunset you actually witness. Picking the wrong city or date is the easiest way to get a result that doesn't match reality, so confirm both inputs. Daylight Saving Time is handled for you, applied automatically from the date and location you choose for 2026, with no manual correction needed on your end.