How to set client timezone

[tathagat]

Hi guys.
I am creating an internationalised application.

I need to show users time, according to their timezone. How can I do that?

I tried the following:

<h:outputText value="#{testService.test.timestamp}">
     <s:convertDateTime dateStyle="full" type="both" />
</h:outputText>

But it shows the time of the tomcat server in different countries. I want it to display the client's local time.

How can I do that? I guess I have to set timeZone like this:

<s:convertDateTime dateStyle="full" type="both" timeZone="XYZ" />

But how do I determine XYZ for user automatically?

Thanks in advance.

[norman]

I don't think timezone is sent via any standard HTTP header.  Try the timezoneSelector.

[tathagat]

Thanks for the reply.

This is what I do to set timezone.

<h:selectOneMenu value="#{timeZoneSelector.timeZoneId}">
    <f:selectItems value="#{staticDataService.timeZones}"/>
</h:selectOneMenu>
<h:commandButton action="#{timeZoneSelector.select}" value="#{messages.ChangeTimeZone}"/>

But then I have the problem that the page doesn't load the new times automatically, unless I refresh the page.
Also this has to be done every time user logs in. So no cookies are being saved. How do I save cookie for timezone selection?

This

<international:locale-selector cookie-enabled="true"/>

does not help.

Thanks in advance.