User blog comment:Monkey.D.Me/FT Anime CONTINUES on FEB 30, 2014/@comment-24.185.133.225-20140304025115/@comment-4449950-20140304125030

Isn't it something to do with incorrect maths when the calendar was first made? Like, originally didn't the calendar not include winter months and then they added January and February (both with less days than 30) and then as people became smarter they realised that they needed to tack on a few more days? I dunno, just Google it I guess XD