1. Using Timelines to Understand History

2. The Gregorian Calendar
Invented by the Romans.
Improved by Pope Gregory XIII – he added Leap Year.
Events are relative the date that Christians believed Jesus was born.

3. Other Calendars It is currently the year:
2015 on the Christian calendar
5775 on the Hebrew calendar
1436 AH on the Islamic calendar
Year of the Sheep on the Chinese calendar

4. The Gregorian Calendar
BC = “Before Christ”
AD = “Anno Domini”
No, it does not mean “after death”.
Latin meaning: “the year of our lord”.
This year is 2014 years since Christians believe Jesus was born.

5. The New System BCE means “Before the Common Era” CE means “Common Era”
44 BCE = 44 BC
CE means “Common Era”
2013 CE = 2013 AD

6. Similar to Number Lines-2 -1 1 2
Point out: 1 BCE comes after 2 BCE.
1 CE
2 BCE
1 BCE
2 CE
3 CE

7. Relative Time YA = “years ago” Dinosaurs died out 65 million YA
Earliest humans: 4 million YA

8. Rough Estimates of Dates
Ca. = circa = “around the time of”
Remember: circa sounds like “circle” which is round.
First stone tools were made ca. 2 million years ago.

9. Watch the video and answer the question at the end.

10. Class Definition The study of the past.
Key words: documents, people, pictures, timelines…