The common view is that the Tabernacle/Temple system used to function but now has passed away. The reality is that the Tabernacle system was always a shadow of the real that is in heaven. The functions of the Mosaic system always taught us about the universal reality of who God is and what He is doing across history, and in shadow-form displayed for us what occurs in heaven (the high priestly function of Christ).
In similar fashion, the feasts of the Lord from Leviticus 23 teach and remind us of the historic, present, and future events which comprise what we might call redemptive history. Their didactic, formative, enlightening, celebratory, and anticipatory function has no more passed away than has God’s intent to save the elect. These festivals predict, enflesh, describe, and memorialize the redemptive acts of God in history. How could we possibly ignore them?
Too often these festivals are pitted against Christmas and Easter, as if one must pick between the two sets of observances. Horrors. If you, as I, can’t imagine ignoring the Incarnation or the Resurrection, why would you ignore the Atonement, the Ingathering, or the Wedding Feast of the Lamb?
One of the graces of serving a timeless God is that what He determined in the beginning is as certainly accomplished as what we have already witnessed. Whether we celebrate those acts of God that have already occurred because they make us who we are, or we anticipate those acts of God that comprise our hope, we have been given the great gift of holy days to memorialize the saving purpose of God in history: then backwards and then forwards, as now.
If anyone—before or after Christ’s first advent—looked to the keeping of the festivals as an aspect of justification they will stand condemned at the judgement seat. The same thing was true and remains true of the sacrifices. They functioned temporally to make physical access to the earthly Tabernacle permissible, but have never and will never take away sin (Hebrews 10:4).
Just as being an American is in no way dependent upon celebrating July 4th, but no American can imagine foregoing the memorial of our nation’s birthday, the festivals of the Lord have nothing to do with making us God’s people, but everything to do with the lived experience of being God’s people.