My favourite day of the week is Saturday mainly because, as I work for myself, I tend to treat Monday to Friday as normal workdays, to discipline myself in getting a lot done.
I use Saturday to relax, to shop and socialise and to do exactly what I want, which is usually nothing!! With Saturday, I can really lie in as long as I want too and I know there is also another 'free' day to come, which makes me feel even more joyous and relaxed.
I tend to meet with friends on a Saturday too, or go out on dates, so I have to say that this day is usually a favourite.
But which one floats your boat? :o)