Use date/time of calendar event in automation

Configuration
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1

Hi,

I have a calendar that contains our holidays.

I’m trying to create two automations:

One that triggers when a holiday starts, but only if the holiday is longer than 48 hours

One that triggers 24 hours before the holiday ends.

I’m fairly new to HA, so any pointers are welcome :wink:

2

You can trigger off the start and/or end of a calendar event using a Calendar trigger. Then use the available trigger data as part of a condition.

If your holiday events are multi-day event you could use something like:

trigger:
  - platform: calendar
    entity_id: calendar.holidays
    event: start
condition:
  - alias:  Holiday is at least 48 hours long
    condition: template
    value_template: |
      {{ trigger.calendar_event.end|as_datetime|as_local - trigger.calendar_event.start|as_datetime|as_local >= timedelta(hours = 48) }}

24-hours before end:

trigger:
  - platform: calendar
    entity_id: calendar.holidays
    event: end
    offset: "-24:00:00"
3

Thanks! Implemented. I’ll update in a couple of days if any adjusting is required.

4

Quick update, bit later than a couple of days though :grimacing:

Everything works perfectly with the above implementation!