There's an easy way to test this. Pick another few dates randomly and try to get it to show up, along with 69 and 420, in all these places.I fully expect that when 12/9 passes and nothing happens, you all will go full Q-Anon level and pick a new date to start perseverating on.
This has to be the largest, most gratuitous display of Confirmation Bias ever recorded in human history.
I did that and totally failed, which leads me to believe that something is going on here.
Also you can roughly estimate the probability of each of these 12/9, 5-1, 69 and 420 coincidences showing up if you want to work through the math. We have a long string of events here that have like 100:1 or 1000:1 odds each. If they were independent random coincidences then you'd multiply those probabilities together and the odds of this being random happenstance is roughly zero.