'First Day' in the Bible

On the first day that you hold the sacred assembly, you are to do no servile work.

"Tell the Israelis that on the first day of the seventh month you are to have a Sabbath of rest for you a memorial announced by a loud blast of trumpets. It is to be a sacred assembly.

On the first day, you are to hold a sacred assembly, when you are not to do any servile work.

"On the fifteenth day of the seventh month, when you've harvested the produce of the land, you are to observe the festival of the LORD for seven days. The first day is to be a Sabbath rest, and the eighth day also is to be a Sabbath rest.

"On the first day, take branches from impressive fruit trees, branches from palm trees, boughs from thick trees, and poplars from the brooks. Then you are to rejoice in the presence of the LORD your God for seven days.