cal [options] [[
Print 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. With no arguments, print a calendar for the current month.
Display Julian dates (days numbered 1 to 365, starting from January 1).
Display Monday as the first day of the week.
Display entire year.
cal 12 1995
cal 1994 > year_file