Calendar trigger for ical sensor

Hi there,

I use the ical addon in order to get sensor ical events (sensor.ical_event1).
This works and I get

summary: Holidays Day off
description: |+

location: ''
start: '2023-10-02T00:00:00+02:00'
end: '2023-10-03T00:00:00+02:00'
eta: 0
all_day: true
icon: mdi:calendar
friendly_name: Holidays Day off

Now I would like to use the calendar trigger, but HA complains that this is no calendar entity, which is correct. How can I use the calendar or time trigger in conjunction therewith?

Best wishes,