One swallow does not make a summer.

Meaning: A single favorable occurrence cannot establish a lasting pattern; sustained evidence requires repetition.

Origin: From 'A Dictionary of English Proverbs and Proverbial Phrases' (1870). Public domain.

Translations

• French: Une hirondelle ne fait pas le printemps (literally: One swallow does not make a spring)
• Spanish: Una golondrina no hace verano (literally: One swallow does not make a summer)

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