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).