a red-letter day
Meaning: A red-letter day is a day that is very important for some reason.
- The day Tatiana graduated from university was a red-letter day for her whole family. She was the first person in the family's history to get a university degree.
- Today is a fantastic day for us - a real red-letter day! We've just been blessed with our first child - a beautiful baby boy!
Today is a red-letter day for our football club. For the first time ever, we've