The Sacrifices of Passover

In Exodus 12, there is a peculiar phrase that describes the transition from one day to another, and it's translated as "between the evenings". Considerable debate has gone for centuries: is this is the beginning of a day, the twilight period between sunset and dark. Or is this the afternoon ending of the day, between mid afternoon and sunset. Understanding the debate is critical to establish the proper timing of Passover events. Let's study the sacrificial system in detail to see if we can find some other clues to help us in placing the events in proper order.