Definition & Meaning of "one swallow does not make a summer"

What is the origin of the proverb "one swallow does not make a summer" and when to use it?

The origin of the proverb "one swallow does not make a summer" is believed to come from ancient Greece, with similar sayings found in the works of Aristotle. The phrase suggests that one good event or piece of evidence is not enough to determine whether something will continue or be successful. It emphasizes that a single occurrence should not be seen as proof of a lasting change or outcome. The proverb is often used to remind people that drawing conclusions based on just one instance can be misleading.