Hosea 2:11

“I will also cause all her mirth to cease, her feasts, her new moons, and her sabbaths, and all her solemn assemblies.”

And all her celebrations, and her rituals, and her feasts would cease. The round of new moon celebrations, Sabbath celebrations and solemn assemblies would be no more. Israel would become a desolate land with a failed religion which had ceased to operate.

Note the assumption that new moons and sabbaths would be in operation, together with solemn feasts. This points to the background of the Law (feasts, sabbaths and solemn assemblies are regularly mentioned in Exodus and Leviticus) and new moons in the tradition in earlier days (1 Samuel 20:18; 2 Kings 4:23). Hosea is clearly speaking from a background of well known tradition.