Your gentoo server is not at the proper date? Well, perhaps you did not properly update to the new daylight saving settings?
Step 1: Make sure you’re in sync with portage.
Step 2: Make sure you’re up to date with timezone information.
emerge -av timezone-data
Step 3: Make sure your timezone info is set and up to date:
cp /usr/share/zoneinfo/America/Montreal /etc/localtime
NB Of course, use the zoneinfo file that fits where you are!
Step 4: Restart proper services
and any other you can thing of… or reboot, if you have that kind of luxury.