Once in a blue moon

Once in a blue moon

Something that happens very rarely

This idiom signifies a rare event or occurrence. The phrase originates from the astronomical phenomenon of a 'blue moon', which is the appearance of a second full moon within the same calendar month, a rare event that takes place approximately every two and a half years. It's used in everyday English to denote something happening extremely infrequently.

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Use cases

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Though he lives nearby, I see him once in a blue moon. Our busy schedules clash, and we hardly get to catch up.

I must admit I do clean my car, but it happens once in a blue moon. I just can't seem to find the time between work and family commitments.

My sister and I live continents apart. While we try to keep in touch over the phone, we meet once in a blue moon.

Once in a blue moon, we'd get a chance to ditch our school uniforms and come dressed in casual outfits. Those were the days to look forward to.

I'm not much of a baker. I only bake once in a blue moon, usually for special occasions or holidays.

It is a tradition in our family to gather for a reunion once in a blue moon. The rarity of these events makes them more special.

I don't like to party, so I only go clubbing once in a blue moon when my friends insist.

I'm a vegetarian, but once in a blue moon, I'll have seafood if it's a special occasion.

My grandfather is a man of few words. He gives advice once in a blue moon, but when he does, it's always insightful.

Once in a blue moon, we'll have a surprise quiz in class. This keeps us on our toes and ensures we're always prepared.

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