cal
[
[month
]
year
]
With no arguments, print a calendar for the current month.
Otherwise, print either a 12-month calendar (beginning with January)
for the given
year
or a one-month calendar of the given
month
and
year
.
month
ranges from 1 to 12.
year
ranges from 1 to 9999.
cal 12 1994
cal 1994 > year_file