It's a yearling when the next crop of fawns drop.<img src=icon_smile_big.gif border=0 align=middle> Or, you could say it becomes a yearling NEXT year.<img src=icon_smile_big.gif border=0 align=middle> According to the dictionary a yearling is an animal that is one year old and hasn't reached it's second birthday. So.... a yearling could be 1 year 11 months and 29 or 30 days old. It must be one year old. Anything less is still considered a fawn.