red-letter day

剑桥词典

a special , happy , and important day that you will always remember
值得紀唸的日子；有特殊意義的日子；喜慶日
The day I first set foot in America was a red-letter day for me. 首次踏上美國的那一天對我來說有著特殊意義。 返回 red-letter day