A read-only calendar's alarms cannot be changed or added to. So you cannot edit its alarms, or save new alarms to it. Also, it is not possible to defer its alarms, since to do so would need the deferral time to be saved into the alarm. After its alarms trigger, they are not removed from the calendar and archived until you or another user accesses the calendar in read-write mode.
Non se poden modificar ou engadir alarmas nun recurso de só lectura. Polo tanto, non se poden editar as súas alarmas ou gardar alarmas novas nel. Tampouco é posíbel pospor as alarmas, dado que para facelo habería que gardar o tempo de demora na alarma. Unha vez que se activen as alarmas, non se eliminan do recurso nen se arquivan até que vostede, ou outro usuario, acceda ao recurso en modo de lectura e escritura.