If it took Ed a year to recover from his automail surgery-procedure (manga. i forgot what it was in the anime, but enough time for him to grow a short ponytail)...
Why is Archer up and moving quite easily so soon after he got half his body replaced with automail/evil eye of doom/mouth cannon? And yay for Archer = Bard analogy.
Though I could be wrong and a couple months had passed since 42. Edward apparently has longer hair now...well, before he got sucked into the gate; it looked like he had 4 plaites in his hair instead of the usual 3.