User blog comment:Stickman, The Legendary Hero/5th Wikiversary!/@comment-4958019-20161030201551/@comment-4958019-20161101001927

*4th wikiversary = 2015 - 2016
 * 1st wikiversary = 2012 - 2013
 * 2nd wikiversary = 2013 - 2014
 * 3rd wikiversary = 2014 - 2015
 * 5th wikiversary = 2016 - 2017

As you can see, your 4th wikiversary/year in this wiki was from 2015 - 2016. Your 5th year started after your 4th year. Therefore, it is your 4th wikiversary.