I already have a mechanism to determine the UTC offset of my local time. Further, I'm not against calling CEE modules, but at the moment there are no CEE modules used by my program and I don't want to start now unless I absolutely, no other way to do it, have to. Furthermore, my program doesn't currently use CONVTOD nor TODCONV and, like the CEE modules, don't want to if I don't have to.
Thanks for the thought though. Charles (Chuck) Hardee Senior Systems Engineer/Database Administration CCG Information Technology Thermo Fisher Scientific 300 Industry Drive Pittsburgh, PA 15275 Direct: 724-517-2633 FAX: 412-490-9230 chuck.har...@thermofisher.com -----Original Message----- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of Sri h Kolusu Sent: Friday, June 27, 2014 6:53 PM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: Local Time conversion to/from UTC Time Chuck, You can use the language environment callable service "CEEGMTO" which would give you the difference between the local system time and Greenwich Mean Time (GMT). Eastern Standard Time (EST) = GMT-5 Pacific Standard Time (PST) = GMT-8 Central Standard Time (CST) = GMT-6 Mountain Standard Time(MST) = GMT-7 Check this link which explains about CEEGMTO with examples http://publib.boulder.ibm.com/infocenter/comphelp/v7v91/index.jsp?topic=%2Fcom.ibm.aix.cbl.doc%2Frpsrv20.htm Thanks, Kolusu IBM Mainframe Discussion List <IBM-MAIN@listserv.ua.edu> wrote on 06/27/2014 03:28:41 PM: > From: "Hardee, Chuck" <chuck.har...@thermofisher.com> > To: IBM-MAIN@listserv.ua.edu, > Date: 06/27/2014 03:29 PM > Subject: Re: Local Time conversion to/from UTC Time > Sent by: IBM Mainframe Discussion List <IBM-MAIN@listserv.ua.edu> > > John, > > I am in the process of writing a program that is reading several files. > Some of the files have dates in local and some have dates in UTC. > I want to be able to move between the two time bases as needed. > I don't envision the program reading files from differing time zones > at the same time, but the program could be reading files from any > country in the world. > Currently I'm concentrating on the US so a US based solution would > be fine for the moment. > > Where I can't seem to get my head to go is related to Daylight > Savings Time (DST). > If, for instance, the locale is the east coast of the US, the UTC > adjustment would be -05:00, 05:00 UTC is 00:00 local. If the local > time is 02:00 on the day of the switch in the spring, that's easy, > subtract the signed UTC adjustment from the local time and then add > 1 hour. So, 02:00 - (-05:00) - 01:00 = 06:00 UTC. > But, what if the local time is 01:59? One would subtract the signed > UTC adjustment from the local time and then??? So, 01:59 - (-05:00) > = 06:59, but what about Daylight Savings Time? The current local > time being adjusted is not with the DST range, but the adjusted time > via the UTC adjustment value is. Does DST come into play here? Is > the decision based on the local time or the resulting UTC time? > > A similar question comes into play on the other end of the DST > range. If the local time is prior to the end of the DST range, does > one subtract 1 hour from the adjusted time? > > Finally, what about the other direction. If one has a UTC time > value, what are the rules governing the change to a local time with > respect to DST? > > I hope my explanation isn't too simplistic. Any thoughts or > direction might have that would help would be greatly appreciated. > That also goes to anyone else that might have some input. > > Thanks, > Chuck > > Charles (Chuck) Hardee > Senior Systems Engineer/Database Administration > CCG Information Technology > Thermo Fisher Scientific > 300 Industry Drive > Pittsburgh, PA 15275 > Direct: 724-517-2633 > FAX: 412-490-9230 > chuck.har...@thermofisher.com > > -----Original Message----- > From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU > ] On Behalf Of John Gilmore > Sent: Friday, June 27, 2014 3:22 PM > To: IBM-MAIN@LISTSERV.UA.EDU > Subject: Re: Local Time conversion to/from UTC Time > > Do you need a point solution, i.e., one for a particular longitude and > latitude? Or dxo you need a general one that is parametric in > location? > > John Gilmore, Ashland, MA 01721 - USA > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
