Mark 11-16 details the last week of Jesus life. The week begins with Jesus’ arrival in Jerusalem. History tells us it’s 30AD in the Jewish month of Nisan on the 10th day (probably Monday) and Jesus is crucified on the 14th. According to Exodus 12:3,6 the sacrificial lambs were selected on this day to be slain on the 14th (Passover eve). Jesus is selected on Nisan 10 by God and will be sacrificed for the world on Nisan 14 (Heb 10:11-14). God is always on time because He is omniscient.