Blue Moon

A Blue moon is either astronomical event or used in a phrase as a colloquialism.
== Astronomical Event ==
A Blue Moon occurs when a month has two full moons in it or four full moons within three months.
== Colloquialism ==
Traditionally, the colloquialism Blue Moon means an unusual and not very frequent occurence.
== In the World of Nausicaä ==
A Blue Moon seems to be a colloquialism, based upon the sentence structure used DE1a pg 64.
== References ==
a See Page Conversions Between Editions to convert Deluxe Edition volume 1 (DE1) to other editions
Category:Nausicaä of the Valley of the Wind manga
Category:Events
de:Mani