[SalesForce] Convert Datetime to GMT

Looks like DateTime.parse() takes the string and parses it based on the context users locale to produce a GMT date/time in the database. DateTime.format(String) should create an output string in based on the timezone of the current context user.

So you should be able to use when data comes in:

DateTime dt = DateTime.parse('11/6/2014 12:00 AM');

Then when you go to call the web service you'd use something like:

String dtOut = dt.format('d/M/y'); -- Or M/d/y if you're using American dates.

And for the bonus, you could just use a different argument in the format function such as:

String timOut = dt.format('h:m a');

Your approach is perfect to convert values according to specific Timezone as:

System.debug(' Current Time is '+ DateTime.now() );
System.debug(' Converted Time to PST is ' +
                  DateTime.now().format('MM/dd/yyyy HH:mm:ss',
                  'America/Los_Angeles')
             );

However you can convertTimezone SOQL function in your query. It converts DateTime field to the user’s time zone.:

Case c = [SELECT Id, convertTimezone(SlaStartDate) FROM Case WHERE Id='caseId'];