by
darrylo » Wed Nov 19, 2014 2:25 pm
I'd suggest sticking with iCloud calendar. While it would be nice if sonic had a full-fledged email, contacts, and calendaring suite, that's not going to happen.
I'm currently using iCloud for contacts and calendars, and they've been working well (I use sonic and other places for email). There's even push support. There's also some (hidden) support for backing up your contacts and calendars, although that often requires the use of the command-line. The only real issue is that you have to use a mac's calendar app to manage subscribed iCloud calendars, such as US Holidays, Earth seasons, sunrise/sunset, etc.; amazingly, you can't use a web browser, a pc, or even an iPhone/iPad.
You could also use google for contacts and calendars, but there's no push support (unless you pay google for a paid account). The usual privacy issues exist, too.