BCS is set between 2002 and 2004, whilst BB and El Camino are set from September 2008 to September 2010; initially at the start of the school year, and covering the time period between Walter White’s 50th and 52nd birthdays (including a few days after for Jesse in El Camino).
In BCS we are currently in mid 2004.
Within the universe timeline, this is roughly when Walter starts working his second job at the car wash due to financial difficulties, which hints towards the imminent crossover.
There are a lot of references to the 2008 global economic crash throughout BB.
The recession is implied as one of the reasons why Walter with his illness, lack of health insurance and general family circumstances chooses to “break bad”.
Meanwhile, the flash-forwards to Saul working in the Cinnabon are set a few months after the conclusion of BB & El Camino, and it seems to be quite cold and wintry.
I think we are looking at November/December 2010 or perhaps even January 2011 for these scenes: the scenes that, for now, will ultimately conclude our view into this universe.