Julian Day Calculator

Julian Day: A continuous day numbering system used in astronomy. Begins on January 1, 4713 BC (Julian Day 0).

Islamic Julian Day: Begins on July 16, 622 AD (1 Muharram 1H), which is the date of the Hijrah of Prophet Muhammad PBUH from Makkah to Madinah.

This system is used for precise astronomical calculations and determination of prayer times, positions of the sun and moon.