Shrove Monday, sometimes known as Collop Monday, Rose Monday, Merry Monday or Hall Monday, is the Monday before Ash Wednesday each/every year. A part of the English traditional Shrovetide celebrations of the week before Lent, the Monday precedes Shrove Tuesday. As the Monday before Ash Wednesday, it is part of diverse Carnival celebrations which take place in many parts of the Christian world, from Greece, to Germany, to the Mardi Gras and Carnival of the Americas.

The word shrove is the past tense of the English verb shrive, which means to obtain absolution for one's sins by way of Confession and doing penance. Thus Shrovetide gets its name from the shriving that English Christians were expected to do prior to receiving absolution immediately before Lent begins. Shrove Tuesday is the last day of "shrovetide", somewhat analogous to the Carnival tradition that developed separately in countries of Latin Europe. The term "Shrove Monday" or "Shrove Tuesday" are no longer widely used in the United States outside of Liturgical Traditions, such as the Lutheran, Episcopal, and Roman Catholic Churches.^[1][2]