'First Day' in the Bible

On the first day there will be a holy assembly for you; you must not do any regular work.

"Tell the Israelites, 'In the seventh month, on the first day of the month, you must have a complete rest, a memorial announced by loud horn blasts, a holy assembly.

On the first day is a holy assembly; you must do no regular work.

"'On the fifteenth day of the seventh month, when you gather in the produce of the land, you must celebrate a pilgrim festival of the Lord for seven days. On the first day is a complete rest and on the eighth day is complete rest.

On the first day you must take for yourselves branches from majestic trees -- palm branches, branches of leafy trees, and willows of the brook -- and you must rejoice before the Lord your God for seven days.