Good Friday (n.)youdaoicibaDictYouDict[Good Friday 词源字典]
the Friday before Easter, c. 1300, from good (adj.) in Middle English sense of "holy, sacred," especially of holy days or seasons observed by the church; the word also was applied to Christmas and Shrove Tuesday. Good Twelfthe Dai (c. 1500) was Epiphany (the twelfth day after Christmas).[Good Friday etymology, Good Friday origin, 英语词源]