1.PASSOVER Lev 23:4 'These are the LORD's appointed feasts, the sacred assemblies you are to proclaim at their appointed times: Lev 23:5 The LORD's Passover.
There are 4 Springs Feasts of the Lord
The Day of Atonement was the most solemn of all days in Israel. This was the day of National and Sanctuary Cleansing.