Daylight Savings Time change problem

From: Michael Touw (mvtouw@hotmail.com)
Date: Wed Mar 21 2007 - 10:28:42 EST

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We manually modified the Time Zone information on our TRU64 5.1A ES40
servers as per the instructions previously posted. On our test server,
everything is working perfectly, but on our production server there is a
problem. The date command shows the correct (updated) time, but the last
login time is off by one hour, and any cron jobs scheduled to run at a
particular time are running an hour late. The only thing I have been able
to find is that the zdump command does not display the current date / time.
This line is present on our test server.

Production

$ zdump -v :America/Montreal | grep '200[67]'

:America/Montreal Sun Apr 2 06:59:59 2006 GMT = Sun Apr 2 01:59:59 2006
EST isdst=0 gmtoff=-18000

:America/Montreal Sun Apr 2 07:00:00 2006 GMT = Sun Apr 2 03:00:00 2006
EDT isdst=1 gmtoff=-14400

:America/Montreal Sun Oct 29 05:59:59 2006 GMT = Sun Oct 29 01:59:59 2006
EDT isdst=1 gmtoff=-14400

:America/Montreal Sun Oct 29 06:00:00 2006 GMT = Sun Oct 29 01:00:00 2006
EST isdst=0 gmtoff=-18000

:America/Montreal Sun Mar 11 06:59:59 2007 GMT = Sun Mar 11 01:59:59 2007
EST isdst=0 gmtoff=-18000

:America/Montreal Sun Mar 11 07:00:00 2007 GMT = Sun Mar 11 03:00:00 2007
EDT isdst=1 gmtoff=-14400

:America/Montreal Sun Nov 4 05:59:59 2007 GMT = Sun Nov 4 01:59:59 2007
EDT isdst=1 gmtoff=-14400

:America/Montreal Sun Nov 4 06:00:00 2007 GMT = Sun Nov 4 01:00:00 2007
EST isdst=0 gmtoff=-18000

Test

$ zdump -v :America/Montreal | grep '200[67]'

:America/Montreal Wed Mar 21 10:45:10 2007 EDT