Passover is viewed differently by different people. If you are Jewish, it is one of the main holy feasts that is observed whether you are particularly observant or not. It is part of your cultural identity. If you are a Christian, it may be several things. You may know it from the Exodus story from Sunday School, or you may be familiar with it from how often it is a part of the account of Jesus’s ministry in the New Testament. If you are into Biblical prophecy, both those fulfilled and those yet to come, you see it as one of God’s appointed times and Passover and the surrounding feasts were all fulfilled through Jesus’s death (at the same time as the slaughtering of the sacrificial lamb,) resurrection (on First Fruits,) and the coming of the Holy Spirit (Shavout/Pentecost.)