red-letter day

剑桥词典

a special , happy , and important day that you will always remember
值得纪念的日子；有特殊意义的日子；喜庆日
The day I first set foot in America was a red-letter day for me. 首次踏上美国的那一天对我来说有着特殊意义。 返回 red-letter day