'Sixteenth' in the Bible

The fifteenth to Bilgah, the sixteenth to Immer,

The sixteenth to Hananiah, he, his sons, and his brethren, were twelve:

Now they began on the first day of the first month to sanctify, and on the eighth day of the month came they to the porch of the LORD: so they sanctified the house of the LORD in eight days; and in the sixteenth day of the first month they made an end.