http://snippets.dzone.com/posts Thu, 24 Jul 2008 07:44:04 GMT DZone Snippets: date code http://snippets.dzone.com/posts/show/5288 This function converts a local date to GMT. This version corrects the bug common to this type of conversion where the date is incorrectly converted when the time is close to the DST crossover. <br /> <br /><code> <br />private static Date cvtToGmt( Date date ) <br />{ <br /> TimeZone tz = TimeZone.getDefault(); <br /> Date ret = new Date( date.getTime() - tz.getRawOffset() ); <br /> <br /> // if we are now in DST, back off by the delta. Note that we are checking the GMT date, this is the KEY. <br /> if ( tz.inDaylightTime( ret )) <br /> { <br /> Date dstDate = new Date( ret.getTime() - tz.getDSTSavings() ); <br /> <br /> // check to make sure we have not crossed back into standard time <br /> // this happens when we are on the cusp of DST (7pm the day before the change for PDT) <br /> if ( tz.inDaylightTime( dstDate )) <br /> { <br /> ret = dstDate; <br /> } <br /> } <br /> <br /> return ret; <br />} <br /></code> Fri, 28 Mar 2008 20:56:15 GMT http://snippets.dzone.com/posts/show/5288 frost137 (Douglas Wyatt)