JD Calculator
Other Calendars. Calendar Generator – Create a calendar for any year. Monthly Calendar – Shows only 1 month at a time; Custom Calendar – Make advanced customized calendars; Printable Calendar (PDF) – Calendars especially made for printing; Date Calculators. Duration Between Two Dates – Calculates number of days.
- 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. For the complete JD, add 2,450,000 to the four digit value given in the calendar for the Astronomical Day of your observation.
- Percentage Change Calculator. Please provide any two values below and click the 'Calculate' button to get the third value. In mathematics, a percentage is a number or ratio that represents a fraction of 100. It is often denoted by the symbol '%' or simply as 'percent' or 'pct.' For example, 35% is equivalent to the decimal 0.35, or the fraction.
What is Julian Date?
Compute the JD or UT yourself
Lightshot silent install. To convert from JD to calendar date enter the Julian Date below:
To convert from UT to JD enter the time in UT:
This application assumes use of the Gregorian calendar and only works correctly for dates after 1858. For more on Julian Dates, click here.
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. For the complete JD, add 2,450,000 to the four digit value given in the calendar for the Astronomical Day of your observation. Anamorphic pro 2 2 – professional lens blur tool replacement.
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Click on a year in the left column to download a 2-page .pdf version of the calendar for that year. The calendar for the 2021 is shown below. Click on the image to get a bigger version.
Calendars available for download (in .pdf format): |
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If you need to download the Acrobat plug-in to read a pdf file, you may download it for free from the Adobe website.