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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.
Julian days are the counter, each day incremented by one. So, if you know the value of the Julian day for one date and the value of the Julian day for another, you can simply subtract one from another and find the difference.
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.
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.
1 sty 2000 · JD Date/Time Converter. 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) .
Get the free "Julian Date Converter" widget for your website, blog, Wordpress, Blogger, or iGoogle. Find more Units & Measures widgets in Wolfram|Alpha.
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.
