Talk:A New Wind Blows/@comment-26320293-20151218222847

This extra chapter was originally released in Weekly Young Jump 2013 Issue 1 (N°1612) on december 6, 2012.

Here you can find Weekly Young Jump release history http://youngjump.jp/history/2013.html it mention a special chapter of one punch man with a color front page. Also, a person mentionned this chapter here http://kohada.2ch.net/test/read.cgi/comic/1387786849/94

I personally checked the issue in question so there is no doubt about it. I think that should be enough to update the release date.