Hello Puddings!
Holidays are just around the corner and we all need a big last effort to enjoy a well-deserved lazy summer.
When I'm on holidays I enjoy a good cup of tea and a mystery novel. Once in a blue moon, I'm very lucky and there's a summer storm which creates the perfect atmosphere.
Also, summer is the time to meet friends and maybe a trip to the beach. I am normally late, however, in summer I'm late once in a blue moon because I have lots of free time.
"Once in a blue moon I listen to folk music,"
"I go to the cinema once in a blue moon."
Although a literal 'blue moon' (light blue, do not expect a bright colour) may occur due to specific atmospheric conditions: volcanic eruptions or large fires leave particles in the atmosphere which could colour the moon, the phrase has nothing to do with the actual colour.
Every two or three years, a year has 13 full moons instead of 12, that extra moon is know as 'blue moon'. Nonetheless, the moon wasn't always blue.
Back to Mediaeval England, we can find the first known use of the expression in an anti-clerical pamphlet published in 1528. One of the characters does a sarcastic reference saying "Yf the say the mone is belewe* we must beleve that it is true". 'Belewe' is an Old English word which had two separate meanings. One of them was 'blue' and the other one was 'betrayer'.
So, it seems that later on in time and owing to the rarity of an extra moon, 'Blue moon' is used colloquially to mean a rare event.
Good luck with your marks and make your once-in-a-blue-moon activities into habits now that you will have the time.
Cheerio,
BP
*I also found the term: Blewe.
_____________________________________________________________________________
Info: www.todayifoundout.com/index.php/2013/06/the-origin-of-the-phrase-once-in-a-blue-moon
www.phrases.org.uk/meanings/once-in-a-blue-moon.html
https://en.wikipedia.org/wiki/Blue_moon#Origin_of_the_term