red-letter day
noun /ˌred ˈletə deɪ/
/ˌred ˈletər deɪ/
- an important day, or a day that you will remember, because of something good that happened then
重要纪念日；喜庆日 - birthdays, wedding anniversaries and other red-letter days
生日、结婚纪念日和其他值得纪念的日子 - It was a red-letter day for United, who won a place in Saturday’s final.
这对曼联来说是个值得纪念的日子，他们在周六的决赛中赢得了一席之地。
词源early 18th cent.: from the practice of highlighting a festival in red on a calendar. - birthdays, wedding anniversaries and other red-letter days