Well color me purple, I'd have thought more #Wikipedia editing happens during the weekend—imaging hardworking Wiki editors wrapping up a week of work work, looking forward to the weekend to do some Real Wiki Work—but nop.

Here's the last year+ of human editors (anon+registered) seen on English each day, by day of week.

Mon–Thurs dominate, some slacking on Friday, tons of slacking on Saturday. Sunday is between Saturday and Friday.