(one's) lucky day(redirected from their lucky days)
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(one's) lucky day
A particular day or moment in one's life when one experiences extremely good luck, fortune, or favor. Wow, that's the third hand of poker I've won in a row—it must be my lucky day! Sir, today is your lucky day: you've been selected for an all-expenses-paid trip to the Bahamas!
See also: lucky