core/homeassistant/components/google/services.yaml

found_calendar:
  description: Add calendar if it has not been already discovered.
scan_for_calendars:
  description: Scan for new calendars.
add_event:
  description: Add a new calendar event.
  fields:
    calendar_id:
      description: The id of the calendar you want.
      example: 'Your email'
    summary:
      description: Acts as the title of the event.
      example: 'Bowling'
    description:
      description: The description of the event. Optional.
      example: 'Birthday bowling'
    start_date_time:
      description: The date and time the event should start.
      example: '2019-03-22 20:00:00'
    end_date_time:
      description: The date and time the event should end.
      example: '2019-03-22 22:00:00'
    start_date:
      description: The date the whole day event should start.
      example: '2019-03-10'
    end_date:
      description: The date the whole day event should end.
      example: '2019-03-11'
    in:
      description: Days or weeks that you want to create the event in.
      example: '"days": 2 or "weeks": 2'