[ubuntu] Notifications from gnome calendar do not respect the time zone

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http://ubuntuforums.org – My Ubuntu PC and my Gnome calendar are both set to a correct timezone (Australia, Sydney). The default email/calendar client is Evolution, which is set to use the system timezone. The Network time slider shows ON. However, the notifications about my Google calendar appointments show up about 10-11 hours later. I cannot blame Google for that, since email reminders arrive on time. The problem is somehow related to my computer. Can anybody please point out where i should look for a fix? (Hardware)