From bill@amber.ssd.csd.harris.com Fri Sep 17 12:52:39 1993 Received: from travis.csd.harris.com by dkuug.dk with SMTP id AA16308 (5.65c8/IDA-1.4.4j for ); Fri, 17 Sep 1993 22:51:55 +0200 Received: from amber.ssd.csd.harris.com by travis.csd.harris.com (5.61/harris-5.1) id AA19769; Fri, 17 Sep 93 16:52:41 -0400 Received: by amber (5.61/CX/UX-5.0) id AA15546; Fri, 17 Sep 93 16:52:39 -0400 Date: Fri, 17 Sep 93 16:52:39 -0400 From: bill@amber.ssd.csd.harris.com (Bill Leonard) Message-Id: <9309172052.AA15546@amber> To: fortran@vnet.IBM.COM Cc: sc22wg5@dkuug.dk In-Reply-To: <199309171850.AA13220@dkuug.dk> (fortran@vnet.IBM.COM) Subject: Re: (SC22WG5.425) ZONE - DATE AND TIME intrinsic X-Charset: ASCII X-Char-Esc: 29 > Date: Fri, 17 Sep 93 11:39:46 PDT > From: fortran@vnet.IBM.COM > Errors-To: x3j3-request@ncsa.uiuc.edu > X-Sequence: SC22WG5@dkuug.dk 425 > X-Charset: ASCII > X-Char-Esc: 29 > Eastern Siberia is 12 hours ahead of UTC, while Western Alaska is > 11 hours behind. > The DATA_AND_TIME intrinsic defines ZONE as the time difference with > respect to UTC. The difference between 0 and 12 is either +12 or -12, > the difference between 0 and 11 is either +11 or -11; it all depends > on your point of view. > Should I be in Siberia, I have to add 12 to UTC to get local time. > Should I be in Siberia, I have to subtract 12 from local time to get UTC. These aren't exactly equivalent, because of the date. Subtracting 12 might put me on the same day or the previous day, but never on the next day. Adding 12 might put me on the same day or the next day, but never on the previous day. So I would think it would depend on where the International Date Line is relative to Siberia and UTC. > Is the range of values for ZONE -1100 to +1200 > or -1200 to +1100 ? Seems like it might need to be -1200 to +1200. Or maybe I'm all confused... Bill Leonard Harris Computer Systems Division 2101 W. Cypress Creek Road Fort Lauderdale, FL 33309 bill@ssd.csd.harris.com These opinions and statements are my own and do not reflect the opinions or positions of Harris Corporation. ------------------------------------------------------------------------------ Let's put an end to infinity. ------------------------------------------------------------------------------