I DO NOT mean to argue in favor of any JW chronology, but I was looking at the first one.
According to the text, the ending date is 6/21/1918 and the start is some unspecified date in December of 1914 - how convenient.
It is true that 1260 days before 6/21/1918 lands you in January 1915, not December 1914.
Back when my eyes were first being opened to the joke that is WBTS chronology and I was still struggling, I pondered one thought. We know now that the earth orbits the sun in 365 days. Actually almost 6 hours more, but let's just go with 365. Any "creator" of the universe would know this so maybe if there was a God, he'd use real years in his "secret" prophecy, not some BS 360 day calendar year. (and Charles Taz Russell also knew the true length of years when he predicted this stuff). So, using real year lengths would mean 1260 days is actually 1277.5 days. Which, if you plug that into eXcel and subtract 1277.5 days from 6/21/1918, you get December 21, 1914. Which is a December date in 1914. Actually, the date of the winter solstice in case anybody wants make that significant and tie it in as a sign that the prophecy is real (and exactly 98 years before the whole Mayan calendar end of the world debacle). Think about it, the winter soltice. From that point on the days start to get longer. The rebirth of the sun (or the "Son"). It all fits!!! LOL!
However, the problem with this is if you're using 365 day years, (or 365.25 day years), then 1914 calculates out to be 35 or 36.75 years later. So any dates in 1914 or 1918 are irrelevant. So who cares about 6/21/1918?
And if you're using actual year spans, that means 1914 moves to either the fall of 1949 (365 day years) or the summer of 1951 (365.25 day years). Probably more specifically, early October 1949 or early July 1951. And not to start a prophecy, but on Oct 4th, 1949, the UN Building in New York was dedicated. Except that's even contrary to prophecy. The times of the gentiles, ie the rule of man, is supposed to be over, Jesus taking his throne, etc., etc. So a new gentile goverment-type-entity innagurating their new facility is hardly an ending.
But hey, if the JWs want to use this concept to stretch out 1914, they can go right ahead. Just tell everybody what website they got it from and give credit where it is due...
Hey, WBTS, I've got another one to stretch out 1914. Since years are really 365 days, you can't have a 360 calendar year after year or eventually everything will be off. Your summer months will be in winter, your winter months in summer, big mess. So every 6 years you've got to throw another month into the calendar. Kind of like we do with leap days. So they inserted the Jewish "leap" month of Adar. So, depending on when you start 7 years, a 7 year span would either have one or two of these Adar months and be either 2550 or 2580 days long. Which would mean 1914 would move to either 1944 (defeat of Germany in WW2) or 1974. Hey, 1974! That's pretty darn close to 6000 years of human existence. Wouldn't that be an appropriate time for God to act? But darn it if those dates have come and gone too. But, if you use 1974, you're only about 40 years into that "generation" thing and you could have a good 30 year run with it...
Please don't flame me. I do not seriously believe in any of this chronology crap. Not anymore at least. But it never fails to fascinate me how people can see relevance in every day occurances and seek out ancient texts to show some correlation. It's like talking to the JFK conspiracy guys who hang out by Dealy Plaza. And it can be very easy to do especially if you play a little loose with exact dates. And I love math and numbers and can easily work up what seems like patterns like these.