Custom sort criteria for dates in views I've got a website filled with events. Some events have a start date, others don't. I sort my events by date on the frontpage so the event closest into the future shows up first.

But their are some events with no dates. These kind of events take more than one day/week/month/... so it doesn't make sense to add a (single) date. 

How can I make a list, by using views, where the dates with a date show up on top and those without close the list by showing up at the end of the page.

Any suggestions on filters or work-arounds where I can specify this kind of sorting criteria?
I haven't tested this, but I would make two views-- View A includes the events with a start date and View B includes the events with no dates.  Then, add View B as the footer to View A.  The events will now be shown on the bottom.