Fair enough...
There is a big difference in comparing dates in history and using minutes/days/seconds/days flipped around equaling other days/etc to try to guesstimate something.
I believe that it is highly possible that certain dates are chosen to correspond to previous events on that day (I think this is where we get the idea of "holidays"). It is also highly possible that you can take any date and "pick and choose" events to fit into an overall larger, but quite possibly, misleading picture.
That said, numbers are such an easily manipulated entity, it is hard to put much credence in anything they "tell you" about a future event. Also, you have to remember that you are focusing on numbers that MAY have a meaning to you (the westerner) while meaning absolutely nothing to those of other cultures.
IF you want to focus on numbers, focus on religiously significant numbers to Islam. 1, 19, 40, and others.
I highly doubt that AQ planners are sitting around with calculators deciding when 1001 days, 100,000,000,001 seconds, and etc. is from their last attack in order to plan a future attack.