Here's another update to the Calendar chapter. I haven't done much editing per se--sometimes when you're writing, you just want to sort of blurt it out rather than go back and edit existing bits--but I will get to that, perhaps after the chapter is done. I also haven't gotten to most of your comments and feedback, sorry, but will do so soon.
This includes a small clean-up of the Facebook events section and a near-complete to-do section.