User blog comment:OneofthePendragon94/The age of Merlin, Arthur, Morgana and Gwen./@comment-4190137-20121115055714/@comment-24492510-20141107161104

It is confirmed that Merlin is at least 2 years and some months younger than Arthur. Morgana is old as Merlin (confirmed in the script). This means that Morgana is older than Artù.



Also, from the start of the first Series to the end of the fifth Series around 7,5 years passed, because evey Series lasted around 6 months (escept for Series 1 and 2, that lasted not more of 4 months).