Blueprint to turn on a device after a random delay

on_delay.yaml

blueprint:
  name: Turn on after random time
  domain: automation
  author: Fredrik Erlandsson
  input:
    light:
      name: Light
      selector:
        target:
          device:
            entity:
              device_class:
                - light
                - switch
    time:
      name: Time
      selector:
        time:
    delay:
      name: Delay
      default: 0
      selector:
        number:
          min: 0
          max: 30
          unit_of_measurement: minutes
    dow:
      name: Weekday(s)
      default: ["0","1","2","3","4","5","6"]
      selector:
        select:
          multiple: true
          mode: list
          options:
            - label: Mon
              value: "1"
            - label: Tue
              value: "2"
            - label: Wed
              value: "3"
            - label: Thu
              value: "4"
            - label: Fri
              value: "5"
            - label: Sat
              value: "6"
            - label: Sun
              value: "0"

mode: single
max_exceeded: silent

variables:
  dow: !input dow
  delay_minutes: !input delay

trigger:
  - platform: time
    at: !input time

condition:
  - condition: template
    value_template: "{{ now().isoweekday()|string in dow }}"
action:
  - delay:
      minutes: "{{ range(delay_minutes) | random }}"
  - service: homeassistant.turn_on
    target: !input light