Many years ago, when there used to be no electricity and light was so dim at night,
it was a major concern to people how the night looks in the moonlight.
And one round of change of the moon shape, which was their main matter of concern, turned to be calculated as the length of a month. It is called the lunar calendar.
It is understandable somehow that much of an ancient civilization originated with the lunar calendar which counted the length of a month by change of the moon shape. You can find the moon as a theme among the works in Wa no Wa. People are fascinated by the mysterious moonlight all through the ages, are not they?
In Japan, April was called Uzuki under the old calendar. It is widely accepted that Uzuki originated with abbreviation of Unohana zuki, or the month when flower of U ( deutzia) blooms.
However, some people say that there are some other origins, which was named after Uezuki, a month of seeding, or Umizuki of plants starting to sprout out.
April also is a special month of commencement of a new year when entrance ceremonies into schools, government and other public offices, and companies are performed in Japan.
A new year begins with cherry blossoms. Cherry blossom is something special to Japanese people just like the moon. It seems understandable somehow or other for us, does not it ?