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Julian dates (abbreviated JD) are simply a continuous count of days and fractions since noon Universal Time on January 1, 4713 BC (on the Julian calendar). Almost 2.5 million days have...
Enter either a Calendar date, or a Julian date and click Calculate. This calculator is a modified version from the U.S. Naval Observatory. Convert the calendar date to julian date and vice versa.
Use this tool to convert a specified calendar date/time to an equivalent Julian Day (JD) number. Enter a date as year - month - day (e.g., 2000-01-01) with an optional time separated from the date with either a space or underbar _ (e.g., 2000-01-01 12:00).
This tool converts between UTC (Coordinated Universal Time) and Julian dates. You may download a reference calendar (pdf) from here: https://aavso.org/jd-calendar. UTC Date. Enter in any format (e.g. 1/1/1900, today) OR. Julian Date. Enter the Julian Date to convert to UTC.
Although JD zero was 1st January 4713 BCE, this calculator will allow negative Julian Dates, and years with up to six figures. The following assumptions are made: Weeks have always had seven days, named as now, since time began.
Julian Date Converter. Day of Week Calendar Date Time (UT1) Julian Date; Thursday: A.D. 1962 June 21 21:25:07.7: 2437837.392450 This is an official U.S. Navy Web site. Hyperlinks do not constitute endorsement by the U.S. Navy of non-U.S.Government sites or the information, products, or services contained therein. ...
This converter allows any date from 1801 to 2099 to be converted into Julian Date. The method used is as outlined in the U.S. Naval Observatory's Almanac for Computers, 1990. NOTE: This converter uses Standard Time and NOT Daylight Savings.
Doug's Excellent Julian Date Calculator. Enter the UT date and time in the appropriate fields and then press the Compute JD button.
Julian Date Converter. Year. Month. Day. After selecting a Month or Day, the change to the Julian Date is immediate. When selecting a different Month, or entering a different Year, the displayed day will remain.
Julian Date Calendar for Year 2021. Day. Jan. Feb. Mar. Apr. May.