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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.
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.
Day-of-Year (JDay) The calculator is bi-directional*. Make Calendar. Select Month / Day / Year and press the "Show_Calendar" button. The Calendar will be displayed in Regular and/or Julian Date Format. Compute JDay from Month / Day / Year*.
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.
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.
The calculator below transforms the date from the Gregorian calendar to Julian and vice versa. It's easy to use - enter the date, and it will show Julian and Gregorian calendar dates.
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).
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.
This calculator deals with only two: the Gregorian calendar, now used universally for civil purposes, and the Julian calendar, its predecessor in most of the western world.
Our calculator allows you to convert any date from the Gregorian calendar to the Julian calendar. For example, if you enter the current calendar date as the input, such as 2022-05-06, you'll get 2022-04-23 as the Julian calendar date as the output.