Date/time installed ports have been updated on a system?

[Ewald Jenisch]

Hi,

Is there any way to determine when upgrades to installed ports have
been done on a system? I did a "portupgrade -arR" recently and want to
know which ports have been upgraded in that process (and no I didn't
run that portupgrade under "script"...)

Couldn't find an option to "pkg_info", "pkgdb" etc...

Thanks much in advance for any clue,
-ewald