org-icalendar-alarm-time

org-icalendar-alarm-time is a variable defined in `ox-icalendar.el'.
Its value is

0

Documentation:
Number of minutes for triggering an alarm for exported timed events.

A zero value (the default) turns off the definition of an alarm trigger
for timed events. If non-zero, alarms are created.

- a single alarm per entry is defined
- The alarm will go off N minutes before the event
- only a DISPLAY action is defined.

You can customize this variable.

This variable was introduced, or its default value was changed, in version 24.1 of Emacs.