Board Thread:The Reference Desk/@comment-60605-20140919101627/@comment-1398253-20140920001542

Based on those ages, there's a time skip after Name. If she was 24 in series 7, and 27 in Deep Breath, then three years roughly have passed before Day of the Doctor, which shows that she's quit her nannying job, got a teaching qualification, and got a job at Coal Hill School. Deep Breath takes place immediately after Time of the Doctor, and Into the Dalek is three weeks after that. So I'd say Clara is not eight months behind the viewers - Time of the Doctor would probably be Christmas 2016, and Into the Dalek onwards in 2017 - so she's three years ahead.