Seven days of time. 2. The week commences immediately after twelve o’clock, on the night between Saturday and Sunday, and ends at twelve o’clock, seven days of twenty-four hours each thereafter. 3. The first day of the week is called Sunday; the second, Monday; the third, Tuesday; the, fourth, Wednesday; the fifth, Thursday; the sixth, Friday; and the seventh, Saturday.
WEEK
TheLaw.com Law Dictionary & Black's Law Dictionary 2nd Ed.