early bird catches the worm
A person who gets up early in the morning has the best chance of succeeding; if you arrive early or are quicker, you get ahead of others. — A proverb.
When Billy's father woke him up for school he said, "The early bird catches the worm."
Charles began looking for a summer job in January; he knows that the early bird gets the worm.
Compare: FIRST COME, FIRST SERVED.
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Source: A Dictionary of American Idioms