The first class will give a broad, hands-on practical overview of the material which includes, Julian and Gregorian calendar, calculation of the Easter date in the West, epact, concurrent, days of the month, days of the week, moveable feasts, different starting days of the year, indiction, eras. Students will be given a practice sheet with medieval dates in different styles and containing a variety of dating methods and asked to solve them in preparation for the second class. The second class will review the solutions the students come up with.