- the Thursday of Holy Week, commemorating Jesus' Last Supper and His washing of the disciples' feet upon that day.
Origin of Maundy Thursday
- Christianity the Thursday before Easter observed as a commemoration of the Last Supper
Word Origin and History for maundy thursday
Thursday before Easter, mid-15c., from Middle English maunde "the Last Supper," also "ceremony of washing the feet," from Old French mandé, from Latin mandatum "commandment" (see mandate); said to be so called in reference to the opening words of the church service for this day, Mandatum novum do vobis "A new commandment I give unto you" (John xiii:34), words supposedly spoken by Jesus to the Apostles after washing their feet at the Last Supper.