una golondrina no hace verano

Spanish

Etymology

Literally, one swallow doesn't make summer, a calque of Ancient Greek μία χελιδὼν ἔαρ οὐ ποιεῖ (mía khelidṑn éar ou poieî, one swallow does not a spring make). The reference to summer instead of spring is shared across European languages; see the descendants at the Ancient Greek entry for more.

Proverb

una golondrina no hace verano

  1. one swallow does not a summer make