Because it remains to be seen if sometimes a predetermined date doesn't show off the themes as expected. They will show up later on in time as important pi or phi points for that matter. That's why I maintain these timelines with pre-determined dates en underlying themes.
If apparently othing peculiar shows off when a pre-determined timeframe with underlying themes comes and goes without clear confirmation, than it will show it's value later on.
In your thoughts you are limited to a linear perspective of time. HDDesign, as you should be well aware about, is based on a completely different perspective and it allways shows it value eventually.
In space it is clear, events are happening for all to review, but when it comes to human interaction in terms of major influence to our collective consciousness it is different.
The most perfect example is the decission to drop the atomic bomp on Hirhoshima, at Phi point between Deep Impact and Tunguska.
That was a decission that didn't made the papers that day do you understand?
That's the reason that I run dedicated threads in HDDesign about specific issues that showed up repeatedly on the patterns in the past, but are merely based on decission making and overall policy.
Personally I think that the latter are the most important to unveil, if we would really like to have a chance to evolve here ( but that's just me)