I hate how my university switched their groupware to #Exchange, which basically means no way for me to use the university-hosted calendars on Android (unless I want to install #Outlook which I, of course, don't).
There seems to be a #CalDAV bridge I could self-host... But I don't have too much time for this :(
@kytta I'm using Nine to add my working calendar on my private android phone (https://play.google.com/store/apps/details?id=com.ninefolders.hd3)