I'd say that for me, Wednesday is more productive than others since all the urgent after-the-weekend tasks are sorted out, so it is a good day to concentrate on something big and important as there are two more days to finish it.
My most productive day of the week is when I train in the morning (I make exercises from here https://betterme.world/articles/... ), then I'm very active all day, it's usually Wednesday and Friday
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