When I'm adding an album that spans several days (for example - photos from a week-long trip), I want to add the date range instead of just one date. I tried a couple of different ways (with a space, dash, slash between two dates) but none worked. Is this possible? If not, would it be possible to add?

PHP and MySQL do not support date ranges. Each image and album gets the date it was created or shot (if in the EXIF metadata). If you want to show a date range, you would have to add it manually to the description or custom data field.

I tried to add it to the date field within the album admin, but it wouldn't accept any format of date ranges. Is there a specific format that I need to enter?
I've tried:
2008-06-30 - 2008-07-11
2008-06-30 / 2008-07-11
2008-06-30 2008-07-11
2008-06-30 : 2008-07-11

Sorry, didn't you read my above post??