xclock

Display the time in analog or digital form. More information: https://manned.org/xclock.

• Display an analog clock:

xclock

• Display a 24-hour digital clock with the hour and minute fields only:

xclock -digital -brief

• Display a digital clock using an strftime format string (see strftime(3)):

xclock -digital -strftime {{format}}

• Display a 24-hour digital clock with the hour, minute and second fields that updates every second:

xclock -digital -strftime '%H:%M:%S' -update 1

• Display a 12-hour digital clock with the hour and minute fields only:

xclock -digital -twelve -brief