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The Calendar

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PowerPoint for August 13th, 2009

PowerPoint for August 13th, 2009

Published in: Education, Technology

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Transcript

  • 1. The Calendar 2009 Information adapted from Millennium: An Interdisciplinary Investigation p. 22 and 24
  • 2. What is a Calendar?
    • A simple way to measure the passage of time
    Picture used from Google Images from ohjoy.blogs.com
  • 3. Calendar
    • Early people in history noticed time changes regularly
    • Sun rises, Sun sets, moon changes, seasons
  • 4. Calendar
    • Many ancient civilizations made calendars
    • Each one is different
  • 5. The Gregorian Calendar
    • 12 months
    • Developed in the 1580’s by Pope Gregory XIII
    • Most widely used calendar in the world
    Picture used from Google Images from parbeszed.com
  • 6. The Gregorian Calendar
    • This is not the only calendar
    • http://www.webexhibits.org/calendars/calendar-jewish.html
    • http://www.webexhibits.org/calendars/calendar-chinese.html
    • http://www.webexhibits.org/calendars/calendar-indian.html
    • http://www.webexhibits.org/calendars/calendar-islamic.html
  • 7. The Gregorian Calendar
    • Christian calendar
    • Based on the birth of Jesus Christ
    • Uses B.C. and A.D.
  • 8. B.C. vs A.D.
    • B.C. = Before Christ
    • A.D. = Anno Domini
      • Latin for “In The Year of Our Lord”
    • B.C. counts down ( 10, 000 B.C. – 1 B.C.)
    • A.D. counts up ( A.D. 1 – A.D. 2009)
  • 9. Other Abbreviations
    • B.C.E. – Before Common Era (same as B.C.)
    • C.E. – Common Era (same as A.D.)