Timezone issues with Postrres

Hi,
I am experiencing the following anomaly while using postgres database:

Time is being interpreted incorrectly when I set time zone to UTC -6
(Central America).
Time shown when I query "SELECT NOW()" is 1 hour ahead of system time.
PS: Central america does not have daylight saving. That might not be the
issue.

Regards,
Pratik Chirania
Hewlett Packard

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