How Sunrise and Sunset Times are Calculated
Solar sunrise and sunset times depend on geographic latitude, longitude, and calendar date using standard NOAA solar positioning equations.
The algorithm calculates Julian Century, geometric solar coordinates, and equation of time adjustments to output precise local standard and daylight saving times.
UK variations: Shortest day (21 Dec): ~7h in London, ~6.5h in Edinburgh. Longest day (21 June): ~16.5h in London, ~17.5h in Edinburgh. Northern Scotland can experience nearly 18 hours of daylight in midsummer.
This tool provides dependable daylight ephemeris for landscape photographers, anglers, pilots, and outdoor enthusiasts.