Specific timezone on visualforce page

Question

page

 <apex:variable value="{!activity}" var="act">
    <apex:outputText value="{0,date,h:mm a}">
    <apex:param value="{!act.Date__c}" /> 
    </apex:outputText>

controller..

        public list <Activity__c > activity {get;set;}


        public GenerateInvoiceController(){

activity= [SELECT Id, Name, Date__c, Quantity__c, 
                              Activity_Lookup_Name__c, Day__c,
                              Unit_Price__c ,
                              Guest_Notes__c, Inhouse_Notes__c
                               FROM Activity__c 
                               WHERE Reservation__c =:  reservationId];
}

Right now I have this code for displaying time. One problem is that it has to show pacific time all the time.(not user's current timezone.)

Any suggestions?

Thank you in advance

Answer 1

You can set the timezone in your controller class, like this:

Assuming myDateTime is a DateTime in GMT, this will give you the time in Pacific Time:

myDateTime.format('h:mm a', 'America/Los_Angeles');

In this case, you can use a wrapper class to add the formatted DateTime to the items in the list you're displaying in your Visualforce page. Try this:

public list <ActivityWrapper> activityWrapper {get;set;}

public GenerateInvoiceController(){

    activity= [SELECT Id, 
                      Name, 
                      Date__c, 
                      Quantity__c, 
                      Activity_Lookup_Name__c, 
                      Day__c,
                      Unit_Price__c ,
                      Guest_Notes__c, 
                      Inhouse_Notes__c
                 FROM Activity__c 
                WHERE Reservation__c = :reservationId];
}

public ActivityWrapper {
    Activity__c activity {get; set;}
    DateTime pacificTime {get; set;}

    // constructor
    activityWrapper(Activity__c act){
        activity = act;
        pacificTime = formatDate(act.Date__c);
    }

    private formatDate(DateTime dt){
        return dt.format('h:mm a', 'America/Los_Angeles');

    }
}

In your Visualforce markup, you can access each activity's properties like this:

{!activityWrapper.activity.Quantity__c}

...and your formatted DateTime like this:

{!activityWrapper.pacificTime}

Answer 2

<apex:page controller="TimeZoneController">
<apex:outputText value="{0,date,dd/MM/yyyy HH:mm:ss}">
    <apex:param value="{!NOW()+offset}"/>
</apex:outputText>

public class TimeZoneController{
    public Double offset{get{
        TimeZone tz = UserInfo.getTimeZone();
        //Milliseconds to Day
        return tz.getOffset(DateTime.now()) / (1000 * 3600 * 24.0);
    }}
    public TimeZoneController(){
    }
}