The Covenant and the Sabbath

In Leviticus 23, two chapters before Jubilee, you have the liturgical year being legislated as a mosaic calendar. The first one is going to be recurring every seven days because it is the Sabbath. The second feast is the Passover, but it's just too good to be summed up in one day. And then notably, the fourth feast is what we call Pentecost. It's literally chevowed as the feast of weeks, the feast of sevens. But fittingly, I suppose, the last three feasts that constitute to seven every year occur in the seventh month.