“Time to get up”, “Time to go to school”. Modern life is ruled by the calendar and the clock. You probably know what the time, day and month is at any moment. The first people didn’t keep track of time though. They hunted and worked during the day and slept at night. They didn’t have...

Does your family keep a calendar posted in the house? How do you know when to go to soccer practice or piano lessons? Most families look at a calendar every day. Calendars keep us organized. Anciently, the first calendars were developed to track the