Calendar doesn't trigger automation


I’m trying to setup a boolean entity helper that indicates if I’m in holidays based on my calendar.

I’ve the following yaml:

alias: "[Holidays] Start Holidays"
description: Start Holidays
  - platform: calendar
    event: start
    offset: "0:0:0"
    entity_id: calendar.holidays
condition: []
  - service: input_boolean.turn_on
    metadata: {}
    data: {}
      entity_id: input_boolean.in_holidays
mode: single

The calendar.holidays comes from a google apps integration. I do see the even in my “holidays” calendar in home assistant, at the proper hour.

But if I go in the automation, I see the “Last triggered” = “never”.

Any idea what I’m missing?