# Julian Day module

The Julian Day calculator module
Julian Day

This module converts between the calendar Date and time, the Julian Day, and the Modified Julian Day. The Modified Julian Day is simply equal to the Julian Day - 2,400,000.5.

To use the module, enter one of the three dates and the corresponding values for the other two date systems will be displayed.

Exercise:

What calendar date does MJD = 0.0 correspond to?