A single parameter specifies the year (1 - 9999) to be displayed; note the year must be fully specified:
If no parameters are specified, the current month’s calendar is displayed.
The Gregorian Reformation is assumed to have occurred in 1752 on the 3rd of September. By this time, most
countries had recognized the reformation (although a few did not recognize it until the early 1900’s.) Ten
days following that date were eliminated by the reformation, so the calendar for that month is a bit
Select a month and type in a year.