How to change/Create a Device Definition File

I missed that you can also set the day of the week.

service: zwave_js.invoke_cc_api
data:
  command_class: '129'
  method_name: set
  parameters:
    - 17
    - 30
    - 4
target:
  device_id: 944c35a75395d3400c248ba317984b18

Day of week is 1 (Monday), 2 (Tuesday), …, 7 (Sunday).