The majority of my egg cartons are recycled.  My customers bring them back to me when they need a refill.  I found some small, rectangular post it notes.  As I start a new carton, I write the date I started it on a post it and attach it to the top of the carton.  When that carton is filled I write the end date on it.  That way there's not a bunch of old dates to cross out on the carton itself.  Much like ranchhand does.
	
		
			
		
		
	
				
			
	