time update - not
 

user has item in form w date/time cell
user copies/pastes item at a later date to update contents
(I use this to keep track of most current article drafts)
updating date/time cell in form has to be done manually
I assumed date/time cell would update automatically to current date/time if un-checked

The Date Modified attribute gets updated when you change an item, and you can't change it manually. I'm not sure if you can add that attribute to a form.

That was a wonderful idea. Thank you. And, yes, it's available for forms. Solved that problem for me. Thanks again.