Step 1 : Introduction to the question "1. Any important or special day of celebration is described by which of these expressions? "
...1. Red-letter 2. White knuckle 3. Blue-plate special 4. White-bread The phrase 'red-letter day' comes from the times when church festivals were highlighted in red on the calendar. The first Book of Common Prayer, published in 1549, had all the holy days marked in red. It has now passed into everyday usage to describe any day which has a special meaning, like your wedding day, the day you get your dream job or the birth of a child. A blue-plate special is an American expression referring to a low priced meal and white-bread is another Americanism to describe someone boring. White knuckle is used to describe something frightening, such as a roller coaster ride, where gripping hard makes your knuckles turn white.
