Red-letter day: a day remembered as especially happy and significant
Red letter day is any day that is of specific significance according to the medieval church calendar. They used red ink to show these days. Red letter day is a synonym for a public holiday in many countries of the world.
Red letter day would be any day that you feel is special to you or holds something significant to you that is of importance to you. Red letter day should be a happy ocassion to you.
It refers to a day being noteworthy or of hanging a banner of announcement, usually of good news.
The phrase means to be nervous or anxious about something.
It is not an idiom, it means your nose is itching.
idiom means expression like a page in a book
Simply its mean a bully.
Just a flowery word for day.
It's not an idiom. It means just what it says -- it's either going to rain that day, or it will be sunny.
It takes a long time to do an important job
It refers to a day being noteworthy or of hanging a banner of announcement, usually of good news.
"A black day" is an idiom in contemporary English that is relatively uncommon but still quite useful. With "black" referring primarily to darkness (of night, of a storm, etc.) when there ought to be light, its basic meaning is simply this: "a bad or difficult day."
The phrase means to be nervous or anxious about something.
It's not really an idiom. It means "what are you thinking about."
It is not an idiom, it means your nose is itching.
RFP is not an idiom. It's an abbreviation.
"Sieve" is not an idiom. See the related link.
It's not an idiom. It means the tip of your nostril.
idiom means expression like a page in a book