Google Webmaster tools has a tool that lets you tag structured data after you've added your site
to Google's index and tied it to an account. This doesn't change the source code of your site.
I decided to try this out on the Event schema page on this site. I decided to leave the manually-created
microtagging that was already on that page in-place to see how they would get along. Currently, there is not
any benefit, snippet-wise, from having this structured microtagging on the Events page.
Here is what the Data Highlighter tool looks like:
Here is what it looks like after you've used it to highlight a page:
As of right now (March 13, 2014), this is the snippet result we get for a Google search of
"mcrdtest neocities event":
