where does something old something new something borrowed something blue come from
Something old The old item provided protection for the baby to come. The item borrowed from another happy bride provided good luck. The colour blue was a sign of fidelity. The sixpence — a silver British coin — was a symbol of prosperity or acted as a ward against evil done by frustrated suitors. The superstition is known since 1883 when it was attributed to the county of Lancashire.[1] An 1898 compilation of English folklore recounted that:
Blue moon Owing to the rarity of a blue moon, the term "blue moon" is used colloquially to mean a rare event, as in the phrase "once in a blue moon".[4][5]