1 00:00:02,029 --> 00:00:20,129 Measuring time. We talk about the past in numbers of years. A year is 365 days or 12 months. 2 00:00:46,240 --> 00:00:51,240 A calendar measures time in days, weeks, and months. 3 00:00:51,240 --> 00:00:56,240 Each day we wake up in the morning, we have lunch in the afternoon, and go to bed at night. 4 00:00:56,240 --> 00:00:58,240 Morning, noon, and night. 5 00:00:58,240 --> 00:01:00,240 Morning, noon, and night. 6 00:01:00,240 --> 00:01:03,240 Each and every day. 7 00:01:03,240 --> 00:01:07,239 On this calendar, you can see the year and the month. 8 00:01:07,239 --> 00:01:10,239 The year on this calendar is 2019. 9 00:01:10,239 --> 00:01:12,239 The month is January. 10 00:01:12,239 --> 00:01:15,239 There are seven days in a week. 11 00:01:15,239 --> 00:01:24,439 Let's look at those, Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, and Saturday. 12 00:01:24,439 --> 00:01:26,980 Every week has those same names. 13 00:01:26,980 --> 00:01:30,519 Let's go over to January 22nd, it's a Tuesday. 14 00:01:30,519 --> 00:01:32,480 Let's call that today. 15 00:01:32,480 --> 00:01:39,459 So if today is January 22nd, then yesterday was January 21st, Martin Luther King Day. 16 00:01:39,459 --> 00:01:43,359 Tomorrow is Wednesday, January 23rd. 17 00:01:43,359 --> 00:01:47,719 Not only do calendars help us know what day of the week it is, they can help us learn 18 00:01:47,719 --> 00:01:50,280 math and more about history. 19 00:01:50,280 --> 00:01:53,359 Remember, there are seven days in a week. 20 00:01:53,359 --> 00:01:58,680 Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, and Saturday. 21 00:01:58,680 --> 00:02:01,359 And there are 12 months in a year. 22 00:02:01,359 --> 00:02:09,680 January, February, March, April, May, June, July, August, September, October, November, 23 00:02:09,680 --> 00:02:11,120 and December. 24 00:02:11,120 --> 00:02:19,120 For all these days and months, do you know what the most important one is on this calendar? 25 00:02:19,120 --> 00:02:21,180 Your birthday! 26 00:02:21,180 --> 00:02:24,360 See you next time and keep learning! 27 00:02:24,360 --> 00:02:28,000 I got him! 28 00:02:28,000 --> 00:02:29,000 Ow! 29 00:02:29,000 --> 00:02:42,840 My bad! 30 00:02:42,840 --> 00:02:44,800 Every year has a number. 31 00:02:44,800 --> 00:02:48,900 The year 1 is the year Jesus Christ was born. 32 00:02:48,900 --> 00:03:01,860 count the years from these points. In history we count years in hundreds. We 33 00:03:01,860 --> 00:03:15,819 call 100 years a century. Years and centuries after the birth of Jesus 34 00:03:15,819 --> 00:03:23,159 Christ are called AD. Years and centuries before the birth of Jesus Christ are 35 00:03:23,159 --> 00:03:31,819 called B.C. A.D. means Anno Domini in Latin, also after death. 36 00:03:33,599 --> 00:03:43,120 D.C. in Castellano, después de Cristo. B.C. means before Christ. A.C. in Castellano, 37 00:03:43,599 --> 00:03:55,990 antes de Cristo. What is the meaning of B.C. and A.D.? 38 00:03:55,990 --> 00:04:03,409 It is commonly thought that BC stands for Before Christ, and AD stands for After Death. 39 00:04:03,889 --> 00:04:05,210 This is only half correct. 40 00:04:05,789 --> 00:04:10,810 How could the year 1 BC have been Before Christ, and AD 1 been After Death? 41 00:04:12,009 --> 00:04:14,389 BC stands for Before Christ. 42 00:04:14,870 --> 00:04:19,810 AD actually stands for the Latin phrase Anno Domini, which means In the Year of Our Lord. 43 00:04:20,290 --> 00:04:23,750 The BC-AD dating system is not taught in the Bible. 44 00:04:23,750 --> 00:04:29,389 It actually was not fully implemented and accepted until several centuries after Jesus' death. 45 00:05:00,379 --> 00:05:17,139 2400 BC, Indus Valley as its peak, 1336 BC, rule of Tutankhamun, 800 BC, first hill forts 46 00:05:17,139 --> 00:05:26,779 are constructed, and then we move to AD BC, birth of Jesus, and then is when years start 47 00:05:26,779 --> 00:05:28,500 to count in A.D. 48 00:05:29,220 --> 00:05:30,439 A.D. 43 49 00:05:30,439 --> 00:05:32,740 Romans invade Britain 50 00:05:32,740 --> 00:05:43,019 800 B.C. 51 00:05:43,439 --> 00:05:45,259 Democracy starts in Athens 52 00:05:45,259 --> 00:05:48,319 A.D. 570 53 00:05:48,319 --> 00:05:50,199 Birth of Muhammad 54 00:05:50,199 --> 00:05:53,040 A.D. 793 55 00:05:53,040 --> 00:05:55,120 Viking raids in England 56 00:05:55,120 --> 00:05:58,319 A.D. 1066 57 00:05:58,319 --> 00:06:00,240 Battle of Hastings 58 00:06:00,240 --> 00:06:04,240 A.D. 1509 59 00:06:04,420 --> 00:06:17,939 reign of Henry VIII begins AD 1558 reign of Elizabeth the first begins AD 1837 60 00:06:17,939 --> 00:06:31,600 reign of Queen Victoria begins AD 1914 World War one begins AD 1939 World War 61 00:06:31,600 --> 00:06:44,220 II begins. A.D. 1953. Reign of Queen Elizabeth II begins. A.D. 2012. London Olympic Games.