The line new DateTime(start); will create a DateTime in your local
time-zone - GMT+1. Calling dt.toDateTime(DateTimeZone.UTC) will
convert to the same instant in UTC which is one hour earlier, hence
23:00.
Stephen
On 31 March 2010 08:20, Paul Carey <paul.p.ca...@gmail.com> wrote:
> Hi
>
> In the example below I would expect both date calculations to result
> in 2010-04-01T00:00:00.000Z. The 'Z' in the first datetime instance
> seems to not have the effect I would expect on the plusMonths
> calculation. If this is expected behaviour, I'd be grateful for an
> explanation.
>
> Many thanks
>
> Paul
>
> // joda 1.6, java 1.6, machine timezone GMT +1, no flags passed to
> javac or java
>
> import org.joda.time.DateTime;
> import org.joda.time.DateTimeZone;
>
> public class FooZone {
>
> public static void main(String[] args) {
> DateTime dt;
> String start = "2010-01-01T00:00:00Z";
>
> dt = new DateTime(start);
> System.out.println(dt.toDateTime(DateTimeZone.UTC));
> // 2010-01-01T00:00:00.000Z
> System.out.println(dt.plusMonths(3).toDateTime(DateTimeZone.UTC));
> // 2010-03-31T23:00:00.000Z
>
> dt = new DateTime(start, DateTimeZone.UTC);
> System.out.println(dt.plusMonths(3).toDateTime(DateTimeZone.UTC));
> // 2010-04-01T00:00:00.000Z
> }
> }
>
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