A day for reunions

Today, March 20th, is Reunion of Pure Maidens Day 昔 ピュアな乙女達の同窓会の日 in Japan. It is a very unusual name and I, for one, had no idea what it was about for many years. But I took some time to look it up today, and essentially it is a day that promotes reunion.

The day was created and registered with the Japan Anniversary Association by a group of childhood friends, from Osaka, who went to the same Junior High School. They wanted to create a day to celebrate how you can go back to your childhood with the utterance of a single word, "hisashiburi". "Hisashiburi" is a great Japanese word with no single word equivalent in English, but it means something similar to "no long time no see". 

I am sure they have a reason behind the use of "pure maidens" in the anniversary title, but I couldn't find it. But I do know that they timed the day as it is the season of school graduations. Moreover, the chose for it to coincide with the spring equinox. As such, the date of the anniversary changes annually (either the 20th or 21st) to match the spring equinox.