change content type

I have an predicament; I am creating a series of Exhibit listing pages for an art organization site. These exhibit pages will be "CURRENT", "UPCOMING", and "PAST". Originally, without thinking it through very well, I thought I would create three different content types for these types of content, and then have views display them accordingly. However, upon further consideration, I realized that it would be loads better to have only one content type ("EXHIBITS") that is somehow updated (according to the date field required for each listing) to the appropriate page. i.e.