User blog comment:Oppaichan/Discuss changes and corrections/@comment-7948498-20140415050827/@comment-7948498-20140415124334

Excellent. So where did April 15 come from?

Still, is there a guidebook to confirm? I imagine this will not be the last time a question on birthdates will happen. I can't help but feel sombody's got an attitude where they think that birthdates are just numbers, so write whatever and nobody will notice.

Even Nana and Momo's age come with a little controversy, and can use an official source to confirm.