The Great Triduum
This evening begins the highest of all Christian Seasons; The Great Triduum which culminates on Easter. These three days (Maundy Thursday, Good Friday, and the Vigil of Holy Saturday) are the most somber of times for the church. They recollect Jesus last supper with his disciples and his subsequent arrest, trial, and execution. Many people choose to fast from the time of the Lord’s Supper on Thursday until after the Resurrection Service Sunday morning.
Robbert Weeber sums up the Triduum well.
For Christians there is no time throughout the entire Christian year that is more crucial than the three great days. These are days to be set aside to enter into a worship that is the source of our entire spiritualitya moment in time that defines all time for Christians, a moment in time that is the very sum and substance for our spirituality for every season, every week, every Sunday, and every moment of every day.
Ancient Future Time, page 124