This newbie would like to take a stab at an answer.
From: BRUIN Paul [mailto:pbruin@miranda.com] Sent: Wednesday, October 31, 2007 11:58 To: tz@lecserver.nci.nih.gov Subject: London (GMT) notation self-conflicts
Hello, My company's application servers use the Olson database as a time zone reference. The following listings appear, which I believe are so-named in the Olson database: London (Greenwich Mean Time) Belfast (Greenwich Mean Time) Dublin (Greenwich Mean Time)
I see London and Dublin, with Belfast a link to London. I'm not aware of the full common names of time zones anywhere in the database, just the abbreviations; so the string, "Greenwich Mean Time", probably comes from the "company's application servers" that the author mentions.
These notations are correct only in winter, when all three cities are on GMT.
Yes.
But in Summer, these cities are GMT+1.
Which is why the summer-time abbreviations are BST and IST, respectively. Maybe the "company's application servers" aren't picking that up. Does that make sense? --Bill Seymour