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Convert from calendar date and time to Julian date, and vice versa. Enter either a Calendar date, or a Julian date and click Calculate. This calculator is a modified version from the U.S. Naval Observatory.
1 day ago · Use this tool to convert between date and Julian (yyddd) date formats. Enter a valid date or Julian date, and click 'Convert'. To see an example, click 'Show Example'. Enter dates in the form mm/dd/yy, dd-mmm-yyyy, 'today', '+1 day' or similar. Enter Julian dates in the format yyddd, yy-ddd or yy.ddd.
The Julian date counts the dates in continuous order, without starting over every month. That means that instead of saying 12th Feb 2024, the Julian calendar will count the day as 24043! known as the Julian date or Julian day.
CalendarLabs makes determining the Julian and Gregorian dates for today or any date a breeze. Here is how you can do it. Enter the Gregorian date, hours, and minutes and click ‘Calculate,’ the tool will generate the corresponding Julian date in many formats, including the modified Julian date.
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...
The system is particularly useful for simplifying the calculation of time intervals between different events and for integrating time-related data from diverse sources. This tool converts between UTC (Coordinated Universal Time) and Julian dates.
AAVSO produced JD Calendars give the last four digits of the Julian Day for each day of every month for a year. The months January-June are on one page while July–December are on the second page.
