jsf timezone

in view

....
<f:convertDateTime pattern="dd/MM/yyyy HH:mm:ss" locale="en" timeZone="GTM+7" />
....

timeZone="GTM+7" is Bangkok, Hanoi, Jakarta

OR

set Locale timezone  (web.xml)

...
...
...
    <context-param>
        <param-name>javax.faces.DATETIMECONVERTER_DEFAULT_TIMEZONE_IS_SYSTEM_TIMEZONE</param-name>
        <param-value>true</param-value>
    </context-param>
...
...
...