Board Thread:Naruto Discussions/@comment-5273810-20150213005350/@comment-25632268-20150213093445

NeedleJizo wrote: Kakashi and Obito were 13 during the Third Shinobi World War and 31 during the Fourth, so it's been 14 years, give or take a few months.

You did your math wrong :) 31 - 13 = 18, not 14 :)