create backdated offer

Summary:

Content (please ensure you mask any confidential information):

Hello,

We have a requirement where an internal employee has applied to internals job and now we want to backdate the offer to may 2023, but systems isnt letting us do that, the dates are greyed out.

How else will we select the date ?

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

23c

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