Might be weird, but, I have heard this "2012" reference many many times when things started to change (for worse), and then "2020" when it all started to go dow

Might be weird, but, I have heard this "2012" reference many many times when things started to change (for worse), and then "2020" when it all started to go downhill with an ever-accelerating pace. Very consistently these two years from multiple people. Any rational explanation for this?