Plan is a schedule planner based on X/Motif. It displays a month calendar similar to xcal, but every day box is large enough to show appointments in small print. By pressing on a day box, the appointments for that day can be listed and edited. Appointments are entered with the following information (everything except the time is optional):

- the date, time, and length of the appointment,
- an optional text message to be printed,
- an optional script to be executed,
- early-warn and late-warn triggers that precede the alarm time,
- repetitions: [n-th] weekdays, days-of-the-month, every n days, yearly,
- optional fast command-line appointment entry,
- flexible ways to specify holidays and vacations,
- extensive context help,
- multiuser capability using the netplan server, provided by the netplan
package.