Q didn't say that explicitly, but yeah, that was my interpretation and the interoperation of many anons. PF post means, shit is going down. POTUS at Pentagon with Shanahan, Kansas, and Pence means shit is going down. I mean if you have noticed, shit is going down.
It's GO time motherfuckers!
No Michael Obama started the tradition.
It was something he took from Mayor Daley, and Michael in his capacity as FLOTUS decided to do the same thing at the WH.
President Trump is continuing the tradition. The two days early thing though I can't explain outside of being ahead of schedule.