leave - warn when it is time to go home
leave [ [+] hh[:]mm]
leave 1500 # Issue a warning at 2:55 p.m.
leave 10:00 # Issue a warning at 9:55 a.m.
leave + 30 # Issue a warning in 25 minutes
Leave sets an alarm clock to a specified time and issues a
warning 5 minutes before, 1 minute before, and at the time
to leave. It then keeps issuing warnings every minute for
10 minutes, then quits. If no time is provided, the program
prompts for one.