I would also like to see this for entering labor.  There have been a number of times when month and day have been transposed, or worse the year entered incorrectly, by our data entry person, not caught, and posted.  Ugh!!
I guess if we go to bar code reading for labor entry that won't be a problem, but for now....
 
For that matter, whenever a future year is entered by mistake in any program, I would like for big alarms to go off!  The only way to catch it currently is that we have entries in "Future Transactions" in GL-O Post GL transactions, and we have been known to ignore these!