as the time line was splitted into two halves known as: B.C. (before christ) and A.D. (anno Domini) there was a confusion lead by some wrong calculation as to when was Jesus the Christ born. A.D. 1 started about a week later the Christ was born, and that was about 2000 years ago. there is no certain date to tell which was the actuall year when the Christ was born. To avoid this confusion, astronomers considered a point in the time line as a zero "0", referred to as the time when the christ was born. and started counting as A.D. 1, A.D. 2..as the years followed. and before that they counted as -1 B.C., -2 B.C... as we've studied in maths in number lines chapter. this counting down is done just to make calculations easier for the astronomers and others uses. there is no zero "0" year as such.
All times dating before AD are circa times; meaning that it is all ball park figures... it counts down to 1 AD which transitions to our present calendar 9 which also has had many adjustments). so basically... when we read time periods that are 5,000 BC means that whatever occured at that time it was approx. 5,000 years before actual collection of time... add that to our current year and that should give you an approximate age of when it existed...
470 years.
918 years
2451 years
BC meaning "Before Christ" (and AD--"Anno Domini," Latin for "Year of the Lord") started being used to denote years in the 6th Century, and became widespread in Europe by the 9th Century.
Every millennium, including the 5th millennium BC, is 1000 years.
BC= stands for Befor Christ(count down) AD= stands for nAnno Domini(in the year of the lord) You know when years counted down right? Well that is BC. Then AD is when the years count up. When the abbreviations are the same then subtract(-) if they are different the add(+) 500 BC And 500 AD its 1,000 years! Now do you get it? If you still dont get it.... ASK YOUR TEACHER!
In terms of "BC" years, 750 BC is 50 years after 800 BC because BC years count down from the year before, instead of up like we currendly do in AD. For example, if this year were 2009 BC, next year would be 2008 BC.
The Mayan Long Count calendar started on the 11th of August, 3114 BC. The date 3372 BC predates the start of the Long Count calendar by about 240 years. Therefore, there are no specific facts about the first day of the Mayan calendar in 3372 BC.
You count from AD then to BC
years were numbered to count backward to indicate the number of years an event had occurred βbefore Christβ or βB.C.β
To count BC time, you start from the specified year and count backwards to 1. For example, to count 5 BC years, you start from 5 BC and count down year by year until you reach 1 BC. Note that there is no year 0, so the progression goes from 1 BC directly to 1 AD.
As of today May 19, 2010 4010 years 4 months and 19 days passed.... This calculations does not count the time variation when people started counting as AD/ BC time which is estimated between 4 and 6 years...
BC means Before Christ. Intead of counting up the years like you do in AD (AD is what we count in now, e.g. 2001, 2002, 2003), you count backwards till you get 0 BC, which is when Christ was born. After 0 BC starts 1 AD then 2 AD etc. So basically, if you started in 2457 BC, and finished 14 years later, you would finish in 2443 BC.
Yes it was. The years BC count backwards to the year 1 BC (12000, 11999, 11998 etc)
The 10th century BC started the first day of 1000 BC and ended the last day of 901 BC.
They were started in 215 BC and completed 4 years after the emperors death so 200 BC he died and that means 19 years.
the indus valley started from 2600 bc till 1900 bc Good luck with the project:)