SunCalc is a tiny BSD-licensed JavaScript library for calculating sun position, sunlight phases (times for sunrise, sunset, dusk, etc.), moon position and lunar phase for the given location and time, created by Vladimir Agafonkin (@mourner) as a part of the SunCalc.net project. This version is reworked and enhanced by @hypnos3.

SunCalc is a tiny BSD-licensed JavaScript library for calculating sun position, sunlight phases (times for sunrise, sunset, dusk, etc.), moon position and lunar phase for the given location and time, created by Vladimir Agafonkin (@mourner) as a part of the SunCalc.net project.

A tiny JavaScript library for calculating sun/moon positions and phases. - Simple. Fast. Reliable. Content delivery at its finest. cdnjs is a free and open-source CDN service trusted by over 12.5% of all websites, serving over 200 billion requests each month, powered by Cloudflare.

Find the first quarter moon phase after a given date and time. Find the next quarter moon phase after a previous one that has been found. Search for the first lunar eclipse after a given date. Continue searching for more lunar eclipses. Search for the first solar eclipse after a given date that is visible anywhere on the Earth.

The scripts contain the calculation of the Julian Day, the sidereal time, the rising and setting of a star and the calculation of ephemerides for the planets, the Sun and the Moon.

Ephemeris Tool can be used for calculating ephemerides of solar system objects, e.g. rise and set times of Sun, Moon, planets and much more. This script, which has now become a part of the AstroTools suite, is a further development of Javascript Skyplanner. Ephemeris Tool (and Skyplanner) was inspired by written by Peter Hayes.

Find the first quarter moon phase after a given date and time. Find the next quarter moon phase after a previous one that has been found. Finds the next perigee or apogee of the Moon after a specified date. Given an already-found apsis, find the next perigee or apogee of the Moon.

A tiny JavaScript library for calculating sun/moon positions and phases.

SunCalc is a tiny BSD-licensed JavaScript library for calculating sun position, sunlight phases (times for sunrise, sunset, dusk, etc.), moon position and lunar phase for the given location and time, created by Vladimir Agafonkin (@mourner) as a part of the SunCalc.net project. This version is reworked and enhanced by @hypnos3.

SunCalc is a tiny BSD-licensed JavaScript library for calculating sun position, sunlight phases (times for sunrise, sunset, dusk, etc.), moon position and lunar phase for the given location and time, created by Vladimir Agafonkin (@mourner) as a part of the SunCalc.net project.