Indeed. But still, somehow I think it makes sense to consider such stats, especially if differences are quite big between contributions on eg, Wednesday compared to Saturday/Sunday. In any case, I would love to see more of these statistics. It seems like an interesting piece of information that can help understand how crowd-sourcing "ticks".

I found it curious that it correlates to the middle of the work week plus basically the middle of the month!

Pay-week for lots of people maybe?