Sunrise/Sunset calculation for given latitude and longitude or for given city. Source: Almanac for Computers, 1990 published by Nautical Almanac Office United States Naval ObservatoryWashington, DC 20392

This online calculator is intended for sunrise and sunset time calculation for given place and date. The calculator algorithm is obtained from the great book of Oliver Montenbruck and Thomas Pfleger "Astronomy on the Personal Computer".