"Sure, no problem! I'll just pull Pumpkin out of her Monday and Wednesday morning preschool since they have a waiting list and won't be able to move us to Tuesday and Thursday, and I'll cancel her Wednesday afternoon swim lesson that she isn't completely fond of anyways. I love the idea of having nothing scheduled for her for four and sometimes five days per week. It will give us so much more time to bond!"
(commence banging head on wall)
Some time over the course of the next four hours, one of the confirmed Tuesday/Thursday parents called the school and asked to be switched to Monday/Wednesday. As you can imagine, I opted to swap, and promptly started humping the leg of the other parent.