Question

I m using Joda Time, and I m being passed DateTimeZones that are created using DateTimeZone.forOffsetHours(). I d like to print these timezones using standard timezone acronyms such as "PST", "EST", etc.

However, whenever I print DateTimes that use these timezones, I get an "hh:mm" representation of the timezone instead of the name acronym.

Here s an example:

public class tmp {
    public static void main( String args[] ) {
        // "PST"
        System.out.println( DateTimeFormat.forPattern("z").print( new DateTime() ) );

        // "PST"
        System.out.println( DateTimeFormat.forPattern("z").print( new DateTime( DateTimeZone.forTimeZone( TimeZone.getTimeZone("PST")) )) );

        // "-08:00"
        System.out.println( DateTimeFormat.forPattern("z").print( new DateTime( DateTimeZone.forOffsetHours(-8) )) );
    }
}

Is there a way to print out the appropriate timezone acronym in the last example using Joda Time?

Answer 1

No, it is not possible, but it s not a joda-time issue, it s because of how timezones work.

The offset (e.g. UTC-8) doesn t determine the location, so is also doesn t determine the acronym that depends on the location. As you can see here, there is UTC-8 in multiple timezones.

The first example works because your default timezone is PST. The second one works because you ask for a timezone by its name (with all the daylight saving stuff, etc.). In the third one you get a fixed-offset timezone that has no name associated with it.

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