The seven feasts given to us lays out God's entire plan for our salvation. The three spring feasts tell of Christ's coming, even gave the time of the year that Christ was cruicified. There was a pause, and the summer feast gave the date of the Pentecost, and the three fall feasts give the second coming of Christ. If they follow God's pattern of predicting the dates of the year, but not the year, that it will happen it even tells us that.