You can send or forward any email to event+SUBDOMAIN@crmondemand.biz and create an event or task. If you want to schedule it on a specific day just put the date in front of a ":" followed by the rest of the title (on the subject line). Just like in Heap, you can specify times using the word "at" or just create tasks.

Your subdomain is the first part (before the first period) of the web address you use to login to your Heap account. So, for instance, the company above would sign in to their Heap account at http://creativearc.crmondemand.biz/. Thus their subdomain would be creativearc.