Expressed in the New moon festivals, The Day of Atonement.

"Months" are celebrations tied to the monthly cycle, the new moon festivals which Isaiah ridiculed Isa 1:14.

I WAS interested to learn that a New Moon Festival was a feature of biblical times.

There were new Moon festivals and special priestly proclamations of each one of them, so that the lunar month came to be called the "synodic month."

The religious observance of a new moon festival is often linked with observance of the seventh day (Sabbath) as in Amos 8:5.

Its tactics centred on non-violent principles, emerging out of consensual communal decision-making through 'heart circles', and out of mystical celebrations, for instance through New Moon festivals.

But as we can clearly see from the Old Testament references cited above, both the evening and morning Sabbath and the New Moon festival were an essential part of the whole Old Covenant.