Question

What does the following Idioms mean??
1. a red letter day
2. let the cat out of the bag
3. round the clock

Tell the meaning of the following Idioms​

Answer 1

Explanation:

a red-ˈletter day

a very special day which is remembered because something important or good happened: Today was a red-letter day. We heard we had won a free trip to Japan. Religious holidays and other important dates used to be printed in red on calendars.