How can we insert a time block/limit for selecting past dates within the system calendar?

Hi everyone!

Using an Autocomplete rule is the only option to insert a block or error message when a date passed in the system calendar is selected? (as you can see from the attachment):

Should one be created for each action? For example: hiring, change assignment, termination, employment contracts, create work relationship, add assignment.

Is there a different possibility instead of creating autocomplete rules?

What impacts could it have? What could be the possible impacts with the other actions/sections?

Thanks for the help.

Kings regards,
Mario