Ghusul is a ritual cleansing from head to toe, in this instance performed with all the solemnity of a trip to a water park.
The Roman Catholic Church refers to it as the “solemnity of All Saints.”
c.1300, "observance of ceremony," from Old French solemnite, solempnete "celebration, high festival, church ceremony" and directly from Latin solemnitatem (nominative solemnitas) "a solemnity," from sollemnis (see solemn). Meaning "state of being solemn" is from 1712. Related: Solemnities.