Sorry, I made a mistake with my calculations on the previous article relating to the timing of the tribulation period in relation to the Jewish calendar. I had said that Rosh Hashanah would occur 1260 days prior to the Passover, but this actually happens roughly 1290 days prior to the Passover. I am not sure whether the extra 30 days has anything to do with the extra month in a leap year or not. I need to do some more thinking about this...

Well I have done some studying into the 1260 days and the 1290 days. It seems I haven't made a mistake in the theory that the seventieth week could begin with Rosh HaShanah and end with Yom Kippur, although I should have taken 1290 days from the date of Passover in order to reach the Feast of Trumpets at the start of the seven year period. I have done some studying into the Jewish calendar system, and it seems that the Jewish leap years vary over a 19 year cycle, and this can affect the length of Daniel's seventieth week depending on when this period begins. At present I am trying to formulate a conclusion to all of this. Thanks.