Talk:Mio Akiyama/@comment-24523872-20140209022608/@comment-30764484-20140210005148

From the manga, Volume 3, Chapter 0, when they go the the shrine for New Years during the seniors' second year, it specifically says the new year is 2009. This means the seniors' first day of high school was April 1st, 2007, and they were born between April 1st, 1991 and March 31st, 1992.