Thank your lucky stars
Definition 1 of 1
Pro Tip 1/3Good Fortune Gratitude
Expresses appreciation for luck or happy outcomes, often to emphasize relief after avoiding misfortune. 
He thanked his lucky stars after finding his lost wedding ring at the beach.
Pro Tip 2/3Informal Expression
Used in casual conversations, might sound out of place in formal writing or speeches. 
You can thank your lucky stars we finished on time, or we'd be working all weekend!
Pro Tip 3/3Slight Superstition
Evokes superstitious imagery of stars aligning, suggesting fate. Not literal belief, but playful. 
Thank your lucky stars the traffic let up, or you'd have missed your flight!