What is the symbolic meaning of Jesus' celebration of the last supper one day before the passover feast?

The symbolic meaning of the Last Supper is that Christ was showing his disciples how they were to remember him. There were to hold on regular occasions what we now call The Sacrament, done mostly on Sundays. Which included the breaking of bread in remembrance of his body and the drinking of water or unfermented wine in remembrance of the blood he spilt. It is also at this sacred time that we have the opportunity to renew the covenants we have made with him.