Convert DateTimeZone to UTC Offset

Question

Given a DateTimeZone, I can get the name and ID of the TimeZone like this:

DateTimeZone timeZone = new DateTimeZone("America/Chicago");

// Prints "America/Chicago"
System.out.println(timeZone.getID());

// Prints "CDT" (Since it is daylight savings time now)
System.out.println(timeZone.getNameKey(DateTimeUtils.currentTimeMillis()));

// Prints "Central Daylight Time"
System.out.println(timeZone.getName(DateTimeUtils.currentTimeMillis()));

All are great, but I really would like to get the timezone as a UTC offset. In this case the UTC offset would look like -05:00

How do I do this with Joda-Time?

I believe [this](http://stackoverflow.com/a/19632076/2055998) answers your question. — PM 77-1, Oct 27 '14 at 21:34
[Time Zone != Offset](http://stackoverflow.com/tags/timezone/info) — Matt Johnson-Pint, Oct 27 '14 at 21:40
http://joda-time.sourceforge.net/apidocs/org/joda/time/DateTimeZone.html#UTC — PM 77-1, Oct 27 '14 at 21:40
The offset depends of the date as it changes with the time (such as daylight savings). — Steve Kuo, Oct 27 '14 at 22:12

score 1 · Accepted Answer · answered Oct 28 '14 at 10:49

A pure Joda-solution looks like:

int offsetMillis =
    DateTimeZone.forID("America/Chicago").getOffset(DateTimeUtils.currentTimeMillis());
DateTimeZone zone = DateTimeZone.forOffsetMillis(offsetMillis);
String utcOffset = zone.toString();
System.out.println(utcOffset); // output: -05:00

score 0 · Answer 2 · edited Oct 27 '14 at 22:18

0

You can use the Date, SimpleDateFormat, and TimeZone to achieve what you want. Make a SimpleDateFormat by setting the TimeZone you want. And then use that to format a new Date();

edited Oct 27 '14 at 22:18

J0e3gan

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answered Oct 27 '14 at 21:37

CMOS

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Convert DateTimeZone to UTC Offset

2 Answers2