Computus (Latin for "computation") is the calculation used to determine the
To find Ash Wednesday, you start with the
The March equinox coincides with
Mar 11, 2016
This method of determining the
A simple procedure to determine
Pope Gregory XIII. Or at least, the calendar to which he gave his name.
These constructs allow the
The Eastern Church sets the
Passover is celebrated on the 14th day of Nisan at the time of the full moon.
Mar 20, 2008
Feb 27, 2016