Displays a monthly calendar.
cal [month [year]] [<] [>]
enter ↵ Open Supported Calendar Software with week view on selected week.
<, > Display calendar of previous/next month.
[month [year]] Display calendar with specific month and year. month can be numbers or English words.
calconfig More configuration options.
Supported Calendar Software
OS X Calendar
1. Support Google Calendar
1. Support BusyCal and Fantastical 2.
2. Optimize write operation to config file.