From the context (Hosea 2:13, 16–17), and similar passages in Isaiah 1:12–17 and Amos 5:21–24, it is clear that the Israelites had corrupted their festivals, new moon celebrations, and Sabbath days. They mixed worship of the Lord with worship of the Canaanite fertility god, Baal. God rejects this syncretism (mixing of different faiths) and declared he would remove these unholy days from Israel’s calendar.