World Civ August 16, 2012

The Dating of Time Have you ever given much thought to time? How important are dates and time to your daily life?

If you were asked the question: “What year were you born,” each of you would automatically respond with a number (1996 or 1997). But have you actually thought about what this number means??? If you were asked the question: “What year were you born,” each of you would automatically respond with a number (1996 or 1997). But have you actually thought about what this number means???

In our system of dating, events are dated by counting backward or forward from the birth of Christ (the year “1”). In our system of dating, events are dated by counting backward or forward from the birth of Christ (the year “1”). Events that occurred before the birth of Christ are labeled “BC” Events that occurred before the birth of Christ are labeled “BC” Events that occurred after the birth of Christ are labeled “AD” Events that occurred after the birth of Christ are labeled “AD” anno domini – “in the year of our Lord” anno domini – “in the year of our Lord” Some historians/books use BCE and CE instead. Some historians/books use BCE and CE instead.

The year of my birth is AD The year of my birth is AD This means I was born 1,982 years after the birth of Christ. This means I was born 1,982 years after the birth of Christ. An event that happened 400 years before the birth of Christ would be dated 400 B.C. An event that happened 400 years before the birth of Christ would be dated 400 B.C. Terms: decade=10 years Terms: decade=10 years century= 100 years century= 100 years millenium= 1,000 years millenium= 1,000 years

Understanding Centuries 100 BC – 1 BC = 1 st century BC 200 BC – 101 BC = 2 nd cent BC 300 BC – 201 BC = 3 rd cent BC 400 BC – 301 BC = 4 th cent BC Etc…

1 – 100 = 1 st century 101 – 200 = 2 nd century 201 – 300 = 3 rd century … 1801 – 1900 = 19 th century 1901 – 2000 = 20 th century 2001 – 2100 = 21 st century Why do you need to know this anyway?

We use the Gregorian Calendar (after Pope Gregory XIII) (1582) We use the Gregorian Calendar (after Pope Gregory XIII) (1582) But not all people use this calendar system. What other calendar systems are used? But not all people use this calendar system. What other calendar systems are used? What’s the difference between the Julian and Gregorian calendars? What’s the difference between the Julian and Gregorian calendars?

For Future Reference

Exit Slip Activity Complete the following questions: Complete the following questions: 1.) What century were you born in? 2.) Queen Elizabeth I died in Which century is this? 3.) Thomas Edison invented the light bulb in the 19 th century. What years?

Exit Ticket 4.) Why did the Gregorian calendar replace the Julian calendar? 4.) Why did the Gregorian calendar replace the Julian calendar? 5.) How would you correctly write King Henry the 8 th using Roman Numerals? 5.) How would you correctly write King Henry the 8 th using Roman Numerals? 6.) Louis XIV is what number? 6.) Louis XIV is what number?