We no longer log player activity but several of the veterans and staff members (myself included) keep logs from the server echos on #aprilon.mc, our IRC server echo. I'll check them now.
[EDIT]
On my log that goes farthest back I found this:
Code:
Jul 29 12:09:53 <Miyuki^APN-MC> [Snugflunkys disconnected]
That time is in my time zone (Central time, GMT -6). If I recall correctly you are in Mountain time so that would be at 11:09:53 for you.
That is most certainly not my only log file, it's just the oldest and the biggest. I'll check the others and see if anything pops up.
I'm not sure if the /seen command is available with commandbook, but in Essentials it shows you when the player logged out last