Just a little note on using Facebook for the calendar. That was also an excuse for me to not deleting Facebook, but I imported the calendar to Google.
It's been a year and I don't miss any of it.
The only reason why I have a Google account is that Google bought YouTube.
Establishing a Google calendar to get rid of Facebook doesn't seem like a win for me...
Besides, how does that work? Much of the Facebook Calendar feature works for me by friends inviting me to events. So in a sense, I will still need to maintain an FB account.