Why do I do that?

I used to have "days" when I was working, but since I retired I do everything as and when I feel like it. The only non-negotiable one is to defrost the freezer on 1 June and 1 December. Otherwise it would never get done.

Did we have the same mother Brunette10 ?

Yes, gym on mon,wed,thurs, big shop thurs, have dinner at Grandsons thurs, long walk with my daughter wed,and sun if she’s up to it.
Household stuff as and when it fits in round my plans.

I do to a certain extent sunseeker but not nearly as bad as my dear mum. We knew which day of the week it was by our tea she put in front. I could rattle the menu off for the days of the week but I shan't bore you all. However I like routines and think it's good for you to have them. My health visitor was amazed at my routines I had with DD when she was a baby and for me/us it worked and helped me through the days. I do have certain days for certain chores and don't suppose it'll ever change as long as it makes you happy.