Hi Chris,
With any calendar plugin or widget you're looking at, you can use the Moz toolbar's highlighter to instantly show you whether the links in the calendar, or event descriptions, are followed. That's the first thing to check out (I don't know if Google Calendar links are or not).
Something else to look at with calendaring is that apparently it's pretty easy to get rich snippets and nice placement in the SERPs if you mark up the events with schema.org/Event markup. You'd probably want to put that markup on the individual event pages, of course, and NOT in the calendar itself.
Third consideration: you'll want to be very careful about how many clicks it is from the home page to the individual event pages, and to try to minimize that. For instance, let's say you care about ranking for the name of a big event to be held in August 2014 now....and, to get to that event from your home page, you had to click:
- Events (then it shows March 2014 calendar)
- next month
- next month
- next month
- next month
- next month
- [name of event]
That'll flow piddly amounts of link juice to your August event's page, and your rankings will really suck.
You might address that by adding links to the next 12 or 24 months calendar pages from the main Events page...or, even better, if Events is a main nav pulldown, have each of the next 12 or 24 months in the pulldown, so that the August 2014 calendar page gets a link from every single page on your site.
Internal link juice flow can make a massive difference to rankings, indexation, etc. so pay attention to this stuff
Cheers,
Michael