Last month, many Christians kept the Passover, as God ordained, and the early church observed. However, do you know that for a select few, their Passover was a month later? Read it for yourselves:

Numbers 9 New Living Translation (NLT)
The Second Passover
9 A year after Israel’s departure from Egypt, the Lord spoke to Moses in the wilderness of Sinai. In the first month of that year he said, 2 “Tell the Israelites to celebrate the Passover at the prescribed time, 3 at twilight on the fourteenth day of the first month. Be sure to follow all my decrees and regulations concerning this celebration.”
4 So Moses told the people to celebrate the Passover 5 in the wilderness of Sinai as twilight fell on the fourteenth day of the month. And they celebrated the festival there, just as the Lord had commanded Moses. 6 But some of the men had been ceremonially defiled by touching a dead body, so they could not celebrate the Passover that day. They came to Moses and Aaron that day 7 and said, “We have become ceremonially unclean by touching a dead body. But why should we be prevented from presenting the Lord’s offering at the proper time with the rest of the Israelites?”
8 Moses answered, “Wait here until I have received instructions for you from the Lord.”
9 This was the Lord’s reply to Moses. 10 “Give the following instructions to the people of Israel: If any of the people now or in future generations are ceremonially unclean at Passover time because of touching a dead body, or if they are on a journey and cannot be present at the ceremony, they may still celebrate the Lord’s Passover. 11 They must offer the Passover sacrifice one month later, at twilight on the fourteenth day of the second month. They must eat the Passover lamb at that time with bitter salad greens and bread made without yeast. 12 They must not leave any of the lamb until the next morning, and they must not break any of its bones. They must follow all the normal regulations concerning the Passover.
13 “But those who neglect to celebrate the Passover at the regular time, even though they are ceremonially clean and not away on a trip, will be cut off from the community of Israel. If they fail to present the Lord’s offering at the proper time, they will suffer the consequences of their guilt. 14 And if foreigners living among you want to celebrate the Passover to the Lord, they must follow these same decrees and regulations. The same laws apply both to native-born Israelites and to the foreigners living among you.”
Very few in the Church even mention this Passover, yet I believe the significance the the second month Passover has even more meaning for Christians, than it did to the Hebrews! Most Christians are unclean! Sorry, but that's true. Do you eat pork, shellfish, catfish? If so, you are unclean. Do you follow Sunday instead of the Sabbath Day, then you are unclean to God. The truth is, that the majority of believers are more unclean before God today, then in the days of Moses.
Tonight's second month Passover, is a symbol to those Christians that are unfit to eat the Passover, but the gift of Christ's sacrifice has paved the way to your salvation.... You see as Paul says, "God saved us when we were still sinners."
Although most don't observe this Passover (which we are tonight), know that God made a plan long ago to save the modern Christian that has bee trapped by paganism.