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Today (october 31st) both my Fedora 15 and Fedora 16 computers had their time set back one hour as if we had entered DST... However this change is scheduled for next week, not today. $ date lun oct 31 09:58:26 EDT 2011 # ntpdate ntp.ubuntu.com 31 Oct 10:58:46 ntpdate[3052]: step time server 91.189.94.4 offset 3600.278798 sec
Hmmm, nevermind, I must be seeing things :) this seems to have affected only one of my computers after all (no idea why).
DST is handled by libc and the data from tzdata package, not by NTP. Make sure you have the right zone in /etc/localtime. Use the following to check which zone that is (there's no more direct way that I know of): find /usr/share/zoneinfo/ -type f -exec md5sum {} \; | grep $(md5sum /etc/localtime | cut -d' ' -f1) I don't think I have issued updates for Canada in last three years or so, modulo some nits in Resolute or perhaps other Native reservations, historical stamps and similar. Of course, severely broken NTP (such that it lets your time drift a week off) might eventually lead to your seeing DST transition earlier, but I don't suppose that's the case.