Hi,

in the managed bean you have a value of type Date, so the pattern doesn't make sense here. When I have the following code, everything works as expected. You have to use a converter when you print the date on the client side.

@ViewScoped
@ManagedBean
public class TestBean implements Serializable {

    private Date value;
    public static final TimeZone TIME_ZONE = TimeZone.getTimeZone("UTC");

    public TimeZone getTimeZone() {
        return TIME_ZONE;
    }

    public Date getValue() {
        return value;
    }

    public void setValue(Date value) {
        this.value = value;
    }

}

                <h:form>
                    <rich:calendar datePattern="MM/dd/yyyy" locale="en/US" value="#{testBean.value}" timeZone="#{testBean.timeZone}">
                        <a4j:ajax render="output"/>
                    </rich:calendar>
                    <br />Output:
                    <h:outputText id="output" value="#{testBean.value}">
                        <f:convertDateTime pattern="MM/dd/yyyy" timeZone="#{testBean.timeZone}" />
                    </h:outputText>
                </h:form>

The full application is available on GitHub: https://github.com/papousek/richfaces-sanbox/tree/thread202093