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Julian Day Calculator

Julian Day Calculator

iOS iPhone Utilities

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Copyright 2010 by Dash Technologies

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Julian Day Calc is a very advanced yet simple app for calculating the both the Julian day ( day of year) and also the Julian date, a 64 bit floating point number.

Please check out our video at :

This application converts between Julian / Gregorian and Gregorian/Julian, so you can go back and forth with both date conversions. You can also email your results!

On the main screen, simply use the date picker to select your date. With every selected date, you will see the Julian Day, the Julian Date and also if the year is a leap year or not!

Our second page of Julian Day Calc allows you to enter a Julian day and it will tell you the Month and day! We also added a year text box so you can change the year to get different dates returned.

- Scroll date picker
- Display current date
- Display Julian Day
- Display Julian Date
- Display Julian Day/Year
- Email Your results to anyone!
- Convert between Julian and Gregorian dates!

Julian dates are simply a continuous count of days and fractions since noon Universal Time on January 1, 4713 BCE (on the Julian calendar). Almost 2.5 million days have transpired since this date. Julian dates are widely used as time variables within astronomical software.

Please contact us anytime at for any future enhancements you would like to see!

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What's New

- iOS 5 Update
- bug fix

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