Sun or Moon?
Finding out what day it is is easy—just look at a calendar. We all know how the days, weeks, and months are arranged into a year: 365 days, 52 weeks, and 12 months. But how did this familiar calendar begin? And how did people keep track of years before they had calendars?
People have used forms of calendars to help them track time for thousands of years. It helped them know when to do
