Board Thread:Questions and Answers/@comment-194.254.125.132-20151101185708/@comment-26854521-20160902143655

He released some information not too long ago (http://towerofgod.wikia.com/wiki/Thread:31718 i  think the source is LaFa from Batoto translating a tweet from SIU).

But there's something we already know. People age differently, because of Shinsoo. So one year most likely means something completely different, depending on how old/talented/powerful (some combination of those) the individual is. The perception of time is probably not that different for people, who still have something to do, and if they haven't lived for thousands of years yet.

People can most likelly actually become younger(in relative terms), since their life expectancy increases with their power and contracts as they are climbing the Tower.

Also SIU posted a long time ago (think it was around the Urek encounter, or maybe a lot earlier even) that he wanted to make a blog post about time, but then decided that he didn't want to spoil that aspect at the time and so he held back on releasing that, or at least that's what he said, if I remember correctly.