Achosi' r larwm ar y dyddiad/ amser penodedig, ac ar bob fewngofnod tan hynny. Noder y' i achosir ar unrhyw adeg y caiff yr ellyll larymau ei ailgychwyn.
Trigger the alarm at the specified date/ time and at every login until then. Note that it will also be triggered any time KAlarm is restarted.