Pause Release on the last working day of the month

Summary:

We need a pause step just before invoicing to prevent the lines from invoicing once it has been shipped. The lines should be billed once a month. Hence all the lines in this particular pause should be released on the last working day of the month. Once they move to Awaiting Billing, it can be billed.

How to define a pause that can be released on the last working day of the month?

Version (include the version you are using, if applicable): 24C

Code Snippet (add any code snippets that support your topic, if applicable): NA