Additional Use Cases for "Period Determination Rule"

Summary:

Has anyone successfully worked with Period Determination Rules on Life Events?

Content (required):

I typically leave these blank, but see some additional information on this field in recent documentation. However I'm still having trouble thinking of any good use cases.

Has anyone found a really good use for these and want to share? Really just for my own curiosity.

Thank you!

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

23A

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