How to send an email on a specific day of the month

Configuration
1

I want HA to send me an email on the 21st of each month with some stats on my irrigation system. I tried this automation but there is an issue with the condition. If I remove the condition, which sets the day of the month to send it, the automation will trigger but then it would trigger every day. How can I send the email on the 21st of each month?

- id: '1653879216797'
  alias: Irrigation - Send usage stats on the 21st of each month
  description: ''
  trigger:
  - platform: time
    at: '20:00:00'
  condition:
  - condition: template
    value_template: '"{{ now().day == 21 }}"'
  action:
  - service: notify.email_xxxxxxxxx_gmail_com
    data:
      message: This month's irrigation costs will be {{ states("sensor.cumulative_irrigation_cost")
        }}. The total irrigation gallons used was {{ states("sensor.cumulative_gallons_used")
        }}.
      title: Irrigation Stats
  mode: single
2

That certainly renders true or false. Perhaps you have too many quotes around it?

3

Thanks, that was it. This works.

condition: template
value_template: '{{ now().day == 21 }}'