Date Converters
Date converters
Convert dates between the Gregorian, Islamic (Hijri), Hebrew, and Julian Day systems, and browse full calendars for each. Instant, accurate, and private.
Hijri Date Converter
Convert between Gregorian and Islamic (Hijri) dates.
Hebrew Date Converter
Convert between Gregorian and Hebrew (Jewish) dates.
Julian Day Converter
Convert any date to its Julian Day Number and back.
Islamic Calendar
Browse the full Hijri year with Gregorian overlays.
Hebrew Calendar
Browse the full Hebrew year with Gregorian overlays.
Hindu Calendar
Hindu festival calendar with regional observances.
Frequently asked questions
- What is the Hijri (Islamic) calendar?
- The Hijri calendar is a lunar calendar of 12 months totalling about 354 days, used to date Islamic holidays. Because it's shorter than the solar year, dates shift earlier each Gregorian year.
- What is a Julian Day Number?
- The Julian Day Number is a continuous count of days since 1 January 4713 BC, used in astronomy and software to make date arithmetic simple and unambiguous.
- Are these converters accurate?
- They use standard astronomical algorithms and are accurate for everyday use. For religious observances, always confirm with local authorities, since some are based on moon sighting.