A year is a long time. So, long ago, people decided to divide it into shorter time periods. About five thousand years ago, the Sumerians divided the year into twelve "moons." Each moon had thirty...
Suns and moons, winters and summers
If you want to know what time it is, you look at a watch or a clock. If you want to know the date, you look at a calendar. A clock measures time during a day. It lets you know when to turn on a...
The month of Mars
March, the third month of the year, has thirty-one clays. On the Roman calendar, the year began with March. Romans named the month after Mars, their god of war, because springtime was when they...
The day of the Prophet
Birthday of Muhammad Muhammad (moo uhd) was the founder of Islam, one of the world's great religions. Millions of people celebrate his birthday. Muhammad was born in Mecca, Arabia, about the year...
Different calendars
The calendar you use every day isn't the only kind of calendar. There are others. The Hebrew, or Jewish, calendar is used to fix the dates of the Jewish religious year. It follows both the moon and...
The Changing calendar
People made the first calendars by dividing a year into twelve \"moons," or months. But they had a problem. A year is the time it takes the earth to travel once around the sun. This comes to about...