He cut it in New Moon when he first became a shape shifter... He let grow it out because he thought bella liked it better long (were now in Eclipse) and after the fight when he ran away from 집 (now were in Breaking dawn) he cut it short again... Hope it helps
Well a 년 이전 I wasnt sure if it was in New Moon 또는 Eclipse....and we were out at a park and didnt have the 책 with us so I asked Fanpop...(and its "who doesnt know that:)