Splain why a database is needed if the GMT offset value is the correct delta, that is, of course, reset when times are changed between GMT and offset value. Or explain why the second datetime stamp, which would have the same delta as the offset in effect, adds anything?
Barry -----Original Message----- From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of John Gilmore Sent: Friday, June 07, 2013 11:53 AM To: [email protected] Subject: Re: Age of datasets in hours, not days? Barry Merrill wrote: | One timestamp and the GMT offset takes less space and is IMO all that | is needed. but Edward Jaffe is correct; unless that offset is supplemented by a database of historical and current information about locale-specific daylight-saving/summer/official/... time in-effect intervals that would be hard to construct and difficult to maintain. There are indeed several such "databases" in existence; and, while they do have some limited usefulness for manual consultation, their coverage is too limited and their accuracy is too low to make them useful for reference from a conversion routine. John Gilmore, Ashland, MA 01721 - USA ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
