I like to read my BDA reports set to the latest 30 day period. I've noticed that if I use the custom date period set to "Last 30 Days," it is actually showing the 30 day period that ended day before yesterday, not yesterday as it should be.
The two screenshots were taken seconds apart on October 16, 2021. Notice that the one set to "Last 30 Days" displays data from September 15 through October 14. The one that I manually set custom dates for the actual past 30 days displays data from September 16 through October 15.
It's nothing that might knock Earth of its axis, but it would be quicker and simpler to just have it always display the actual past 30 days.