cal

Print calendar information. More information: https://keith.github.io/xcode-man-pages/cal.1.html.

Display a calendar for the current month:

cal

Display previous, current, and next month:

cal -3

Display a calendar for a specific month (1-12 or name):

cal -m {{month}}

Display a calendar for the current year:

cal -y

Display a calendar for a specific year (4 digits):

cal {{year}}

Display a calendar for a specific month and year:

cal {{month}} {{year}}

Display date of Easter (Western Christian churches) in a given year:

ncal -e {{year}}