The first Monday after Epiphany, formerly marked by popular festivals or observances in some regions.
首耕周一（显现节后第一个星期一，旧时有些地区在该日举行民间庆祝或纪念活动）
Example sentencesExamples
Plow Monday was a historical observance whose first heyday was in the nineteenth century.
The first Monday after the twelve days of Christmas (Twelfth Night) is Plough Monday, a day when ploughmen traditionally blackened their faces and wore white shirts.
Origin
From the custom of dragging a plough through the streets to mark the beginning of the ploughing season.