Description of problem: Cannot currently determine through the libvirt API when a guest domain was launched. It would be nice to have this information either stored somewhere in date format or where it could be computed from an uptime which includes idle uptime.
Related to this upstream mailing list post. https://www.redhat.com/archives/libvirt-users/2012-April/msg00085.html
There's a newer bug about creation time: https://bugzilla.redhat.com/show_bug.cgi?id=1070411 For uptime, it should be easy to add for most hypervisors, but I think it would need a new libvirt API... I don't know if we can extend domain info. I think this is better served as 'patches welcome' :)