once in a blue moon

once in a blue moon

Meaning | Synonyms

  • very rarely
  • once after a long time
  • something that happens very seldom
  • on rare occasions
  • almost never
  • hardly ever

Example Sentences

  1. The earthquakes hits once in a blue moon in this part of the earth, we never felt it.
  2. I don’t know why she bought that music system – she uses it once in a blue moon.
  3. “I think my grandson doesn’t love me anymore, he comes to see me only once in a blue moon.”
  4. My Dad is working in Scotland and he visits home once in a blue moon, every couple of years.
  5. Although I trust in God, I visit that famous temple only once in a blue moon.


The concept behind the origination of this idiom is second but rare appearance of the full moon in same month. Blue moon is the full moon that appears second time in same calendar month and this phenomenon happens only once in 32 months. Apart from that, sometime the full moon appears to be different in colour specially blue and orange and bigger in size.

This idiomatic expression is in use since 1800s.


O 28 Comments


AuthorZita writes on 7th November 2018

I have seen a red blood moon twice. It happened this year twice.

Thanks, helped a lot.

AuthorMalir Paul writes on 30th October 2018

When I was young I go to my parents’ room once in a blue moon.

AuthorChris writes on 2nd July 2018

That place is a sh*thole because the janitors only come around once in a blue moon.

AuthorAin writes on 17th April 2018

It’s really help me to do my homework given by my teacher

AuthorMoksh writes on 29th March 2018

As I don’t I like to do plagiarism, I would like to give you the academic honesty for helping me a lot in making my speech gorgeous.

AuthorAnonymous writes on 21st February 2018

Nice man it help me do a bunch of things

AuthorBarbara writes on 18th February 2018

This helped me do my homework

Authorzzz writes on 17th February 2018

I think my grandson doesn’t loves me anymore should be “love”, not “loves”

AuthorTanushka writes on 11th February 2018

Once I saw a red blood and blue moon 🌕

AuthorRogèt writes on 6th February 2018

Since I change the oil only once in a blue moon, I might need another oil change!

AuthorAnonymous writes on 5th February 2018

It help me to do homework

AuthorDale Dealing writes on 2nd February 2018

I think the definition is incorrect. The phrase “once in a blue moon” is an Indian phrase for the 4th full moon of a season, Europeans came along and started calling the 2nd full moon of a month a blue moon. The time between a true blue moon is much longer than 32 months.

AuthorAnonymous writes on 31st January 2018

Very informative

AuthorAnonymous writes on 12th January 2018

Even though Dicaprio is my favourite hero, I watch his movies once in a blue moon.

AuthorJuba writes on 25th December 2017

I want more idiom as like that.

AuthorMohan writes on 25th September 2017

I check the meaning of once in a blue moon and I found it here. thanks.

AuthorNandini writes on 15th July 2017

It is nice.

Terrorists attacks once in a blue moon.
Politicians, any officers do their duty perfectly once in a blue moon.

AuthorJegan writes on 6th July 2017

My uncle visited in our home very often, but I go to his house once in a blue moon.

AuthorJegan writes on 6th July 2017

I go to my grandmother guest house once in a blue moon.

AuthorSushil writes on 26th April 2017

I joined spoken English class but I go to class once in a blue moon.

AuthorJharna writes on 18th March 2017

Very nice answers and comments about this.

AuthorShanthi writes on 16th February 2017

I think about future once in a blue moon.

AuthorMuniasamy Samy writes on 12th February 2017

Nice, add more idioms.

AuthorSandy writes on 25th January 2017

I watch SRK Khan’s movie once in a blue moon.

AuthorRich writes on 19th December 2016

I upload videos on YouTube, not very often but once in a blue moon. I found this video on YouTube about this phrase, its usage and origin…

AuthorAxel writes on 28th November 2016


AuthorSharon writes on 5th November 2015

Once in a blue moon i go to the movie theater

AuthorAxel writes on 28th November 2016

That is a cool one great job.

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