Colossians 2:16-23

to let someone tell you what your eternal destination is based on whether or not you participate. The same went for whether or not believers would celebrate the OT feasts that were very specifically commanded in the OT. Or what or not they should worship on Sunday or Saturday,[1] a controversy that according to Richard Melick was alive and well even in the Colossian church. James Dunn notes that the new moon and feasts are connected and lists e.g., Num. 10:10; 2 Kgs. 4:23; Ps. 81:3;,[2] the new moon also had significance in other cults as well, not only in Jewish law.

[1] Melick, NAC.

[2] Dunn, J. D. G. (1996). The Epistles to the Colossians and to Philemon: a commentary on the Greek text (p. 174). Grand Rapids, MI; Carlisle: William B. Eerdmans Publishing; Paternoster Press.