"What Dates Are Used for the U.S. Recession Bars?"

The page says:

At times, the months and quarters of the business cycle turning points do not align. To learn more, see the FRED Blog post “Discrepancies in dating recessions.”

Nope.

 

Perhaps this:

https://fredblog.stlouisfed.org/2021/08/discrepancies-in-dating-recessions/

ps, I find that sort of information useful.