When I saw drops on Mondays, I initially thought it was due to a year-on-year weekday mismatch, but the analysis is sound

> For year-on-year comparisons by day, we compare to the same day of week from the same week in the previous year. For example, we'd compare Tuesday of week 11 in 2020 to Tuesday of week 11 in 2019.

Interesting that most have a double dip, with a big drop on 3/2 and then again on 3/9 which is ongoing