User blog comment:FairyRaven/Fairy Tail Chapter 336: In Order to Live Today to the Fullest, Review and Commentary/@comment-77.195.192.216-20130622091133/@comment-1359322-20130622154558

1 Day = 3 months 4 Days = 1 year 400 years*4 = 1600 Days 1600/365 = 4.4 Years.