Linux - Cal

The following in a Linux dictionary word of the day:

cal – command which has the ability to display a 12-month calendar beginning in January.

-j parameter is for Julian dates (shows days numbered 1 to 365 starting from January 1).

-y parameter is for the display of the entire current year.

[month][year] options to display a calendar applicable to the month and year given. 

Examples:

cal

cal -j

cal -y

cal 01 2000