That's my pattern too. For me it's because by the time I get to the week mark, I feel physically better and it doesn't seem like such an issue anymore.
I am now on day 10 and keeping busy has been a big thing for me at the weekends. On Friday night I was here, posting and watched a couple of films. On Saturday I went out with a sober friend and on Sunday I was in a totally sober environment too with my partner. I just can't have idle hands at the weekend, it's a big thing for me.