Ember dayyoudaoicibaDictYouDict[Ember day 词源字典]
"Any of a number of days reserved for fasting and prayer in the Western Christian Church. Ember days traditionally comprise the Wednesday, Friday, and Saturday following St Lucy’s Day (13 December), the first Sunday in Lent, Pentecost (Whitsun), and Holy Cross Day (14 September), though other days are observed locally", Old English ymbren, perhaps an alteration of ymbryne 'period', from ymb 'about' + ryne 'course', perhaps influenced in part by ecclesiastical Latin quatuor tempora 'four periods' (on which the equivalent German Quatember is based).[Ember day etymology, Ember day origin, 英语词源]