View the calendar of any month in any year.
cal cal [-jy] [[month_number] year]]
-j displays Julian dates (days numbered between 1 and 366).
-y displays the calendar for all months of the current year.
If you type cal without any options, it prints a calendar for the current month. If you type cal followed by a number, cal treats the number as the year and prints the calendar for that year. To view the calendar for a specific month in a specific year, provide the month number (1 = January, 2 = February, and so on) followed by the year. Thus, to view the calendar for April 2003, type the following:
cal 4 2003 April 2003 Su Mo Tu We Th Fr Sa 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30