'New moon' in the Bible

You must not {continue} to bring offerings of futility, incense--it [is] an abomination to me; new moon and Sabbath, [the] calling of a convocation-- I cannot endure iniquity with [solemn] assembly.

And this shall happen: From {new moon to new moon} and from {Sabbath to Sabbath} all flesh shall come to bow in worship before me," says Yahweh.