Currently there is no way to view all changes made to a space since a given date. Such details are only available on a page-by-page basis.

I'd like to see a way that would let you view a list of all pages that have changed just by selecting a date, and drilling into them you'd see the version changes between current the version just prior to that date.

Additionally, it'd be nice to allow us to provide changes in a space export. Exporting a space means taking all content offline, either to hand off to someone in physical version or someone who does not have Confluence access. The problem is that for successive exports you don't know what changed without drilling into the space details (for me: going in Recently Updated, drilling into each page, finding the version prior to the date you exported it, and clicking to see the changes, then printing to PDF).

if this were up to me, I would include a checkbox on the Space export page asking me if I wanted to export Revisions as well. Unchecked by default. Next to it would be a date selector (disabled when Revision checkbox is not checked), which I could use to select a date. if checked, the export would then provide the version changes following each page's most current content – similar to how the RSS feed displays changes (see attached). In color of course.