help with date parsing and time zones

I'm allowing the user to input a date and time and I'm using the pattern:

    DateTimeFormat format = DateTimeFormat.getFormat("yyyy-MM-dd HH:mm");

However, the date is specified as UTC, so if a user were to put in:

    2013-01-01 15:30

This will parse fine, but when printing out the parsed date is says (essentially):

   Jan 1st 2013 15:30 GMT-8

Where I would like this to be either:

 

  Jan 1st 2013 15:30 GMT

  Jan 1st 2013 7:30 GMT-8

I know the docs says:

  "In the current implementation, timezone parsing only supports GMT:hhmm, GMT:+hhmm, and GMT:-hhmm."

But I don't know what that means.  Do I adjust my pattern to include this?  Does the input time need to have GMT in it somewhere?  Thanks!

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