Only a slight hi jack here, since this morphed into a “purchasing pattern” discussion.
I have historically (>25 years) gotten more orders on Sundays (Often late at night) than any other day of the week. Usually significantly more than any other day. I have often wondered “why Sunday?”.
During the CV Lockdown period, Sunday is still the big day, but not by as big of a difference, as the order count on other days has risen.