How many Friday the 13ths have there been since the current calendar was put in place?
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M$4 Answers
I went back and counted, and it turns out my figure was accurate. Today is the 733rd Friday the 13th since the Gregorian calendar was adopted in 1582. The Gregorian calendar is a 400 year cycle, and there are 688 Friday the 13th's every 400 years in that cycle. I counted from 1982 to today's date, and then I added 688. I took into account the month of the year that the new cycle started.
There will be 2 more Friday the 13th's this calendar year, and that's where my 735 figure came from.
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M$You can leave an optional "tip" with Mahalo's virtual currency, Mahalo Dollars. If you are asking a difficult question that might require some research, or if you'd like a wide variety of feedback, a higher tip often leads to more answers to your question.
M$Since the year 1900 A.D. there have been 187.
Since the year 2000 AD there have been 15.
Since the implementation of the Gregorian calendar on 10/15/1582 there have been 733.
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M$1. Friday the 13th (1980)
2. Friday the 13th Part 2
3. Friday the 13th Part III
4. Friday the 13th: The Final Chapter
5. Friday the 13th: A New Beginning
6. Friday the 13th: Jason Lives
7. Friday the 13th: The New Blood
8. Friday the 13th: Jason Takes Manhattan
9. Friday the 13th: Jason Goes to Hell
10. Friday the 13th: Jason X
11. Freddy vs Jason
12. Friday the 13th (2009)
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M$
Hold on. The question says "since the current calendar was put in place". That varies according to where you live. Almost everyone on this site seems to be American, British, or assorted other ex-British colonies. Because Britain was Protestant and didn't like being told to change their calendar by a Pope, the current calendar did not get put in place in our countries until much later. Britain and it's colonies adopted the new calendar Sept 14, 1752. And if you live in Alaska the adoption was in 18 October 1867 . So the calculations are more complex.
What's your source for there being 735?
Math. Wikipedia told me the occurrence, on average, of Friday the 13th's per year. I calculated that from the end of 1582 to the current date to get my answer.