Student or Learner
Is "the catch of the day." a common idiom? Does "catch" mean "a special item you can get like a fish"?
30)Attention shoppers! Starting at 7:30pm, all items in the food department on level B1 will be on sale until closing time...And make sure you don't miss the catch of the day.
Does it only refer to fish or extend to foods, clothes, etc? The content omitted here seems to refer to any item.