Last night was the first time since I started the latest challenge that I felt that I really did eat mindlessly. Having reviewed my consumption, it could have been a lot worse (ie the mindless eating was of nutritious food on the whole) but I still ate when not hungry or even really fancying the food. I still haven't worked out why I do this, but it presumably is a combination of factors (tired, unsettling windy cold weather, boredom, not keeping myself occupied, because I could, because the day before I had felt virtuous, because certain foods eaten triggered the "need" to keep eating, and so on and so on).
But I also tell myself that mindless eating once in 5 weeks is nothing to get too "upset" about. And a fast today is probably an appropriate way of dealing with it. I didn't end up with any fast days in the previous week, though there were a few days when I had long breaks without eating.
Anyway... I expect there might be some other Monday fasters?? Hope the day is going okay for you.