It seems like everything we do is controlled by a calendar. Appointments, classes, meetings, and services are all events we have to make time for. You likely use some type of scheduling tool, and that ...

pt. 1. Calendar in theory -- ch. 1. Calendar -- ch. 2. Astronomical background -- ch. 3. Time and the clock -- ch. 4. Writing and libraries -- ch. 5. Numbers and ...

If January felt endless, February may be refreshing since it's only 28 days long. Thank the Romans for that oddity. Before the Gregorian calendar used today, Roman King Numa Pompilius (715-673 BC) set ...