How does the Doctor know how old he is?

I've often wondered, how does the Doctor know how old he is? He not only travels through time, but also through space, and visits planets where days can be shorter or longer than 24 hours. How does he 'keep score'?

Also, does he count his age in Earth years or Gallifrey years? They might be completely different in length.

Answer

I think one easy answer would be to say that the TARDIS keeps track. After all, it pretty much goes where he goes - or rather, he goes where it goes - and it surely is able to keep a constant calendar going no matter what the conditions are like outside.

Comments

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