User blog comment:Aithusa07/Merlin's Birthday???????/@comment-73.175.53.229-20160502202609/@comment-73.175.53.229-20160502203047

(Anonymous while posting the comment I am replying to now) I actually am not certain if they shared a birth year or not. In the show they seem to depict Merlin as younger than Arthur, or at least a different age. Then again, I'm not sure.