ESX Timezone Confusion
February 7th, 2007
There seems to be some confusion about patching esx2 for the US 2007 DST changes?
http://www.vmware.com/community/thread.jspa?threadID=70539
Here is VMware’s KB on the subject.
http://kb.vmware.com/kb/8695824
So how do I determine when DST starts and ends on my box? Seems like a logical question. Try This command…
zdump -v /etc/localtime | grep 2007
Disclaimer – I still need to confirm this is the definitive answer by rolling the date on a test box forward.
You want to see Daylight Savings Time start on March 11 and end on November 4.
/etc/localtime Sun Mar 11 07:59:59 2007 UTC = Sun Mar 11 01:59:59 2007 CST isdst=0 gmtoff=-21600 /etc/localtime Sun Mar 11 08:00:00 2007 UTC = Sun Mar 11 03:00:00 2007 CDT isdst=1 gmtoff=-18000 /etc/localtime Sun Nov 4 06:59:59 2007 UTC = Sun Nov 4 01:59:59 2007 CDT isdst=1 gmtoff=-18000 /etc/localtime Sun Nov 4 07:00:00 2007 UTC = Sun Nov 4 01:00:00 2007 CST isdst=0 gmtoff=-21600
Here is an old box that hasn’t been patched yet.
/etc/localtime Sun Apr 1 07:59:59 2007 UTC = Sun Apr 1 01:59:59 2007 CST isdst=0 gmtoff=-21600 /etc/localtime Sun Apr 1 08:00:00 2007 UTC = Sun Apr 1 03:00:00 2007 CDT isdst=1 gmtoff=-18000 /etc/localtime Sun Oct 28 06:59:59 2007 UTC = Sun Oct 28 01:59:59 2007 CDT isdst=1 gmtoff=-18000 /etc/localtime Sun Oct 28 07:00:00 2007 UTC = Sun Oct 28 01:00:00 2007 CST isdst=0 gmtoff=-21600