Jews in the NT period reckoned each day to start and finish at 6 p.m., and periods of the day were known by such general terms as morning or evening. Days of the week, except Sabbath, had no special names but were given numbers.
Citation for day
Citation styles are based on the Chicago Manual of Style, 15th Ed., and the MLA Style Manual, 2nd Ed..
MLA
"day." In A Dictionary of the Bible. Ed. W. R. F. Browning. Oxford Biblical Studies Online. May 23, 2013. <http://www.oxfordbiblicalcstudies.com/article/opr/t94/e491>.
Chicago
"day." In A Dictionary of the Bible. , edited by W. R. F. Browning. Oxford Biblical Studies Online, http://www.oxfordbiblicalcstudies.com/article/opr/t94/e491 (accessed May 23, 2013).