Maundy Thursday, the night Jesus was betrayed, is a solemn festival for the Church - we remember how the Gospels tell us Jesus set an example of humility and service by washing his Disciples' feet, how he commanded us to love one another, how he shared bread and wine and told us to do the same 'in remembrance' of him, and how he went to his suffering and death not easily, but freely.
We mark this by the Priest offering the washing of feet in the service to any who wish, as well as special prayers and music for the day, we will share in the Eucharist (Holy Communion), and at the end of the service in preparation for the most solemn day of the Christian Year, Good Friday, we will strip the Altars of the Church, and remove all decorations from the Chancel and Sanctuary (where the choir and ministers sit during services).
The name 'Maundy' comes from the Latin 'Mandatum' meaning 'to command' - the command to love one another being the most important command Jesus gave.