because I never realized that would work. It was easier to think about how close 365 is to the round number 360 which was a nice round ration for 30. 13 28day months are amazing and we could still go with 7 day weeks and have all the days line up perfectly. Every monday is the 1st, 8th, 15th, and 23rd of every month. the 30 day thing I figure we go to a 6 day week. I love it. Of course idiots will get all obsesive about a 13th month.