I'm forwarding this message from hsv@tbbs.net, who is not on the time zone mailing list (at least not at that address). Those of you who are on the list, please direct replies appropriately. Hsv is correct that there's no real shift in April 2005 or April 2006. While the current rules do the right thing, I plan to include a change from... Rule Cuba 2000 2006 - Apr Sun>=1 0:00s 1:00 D ...to... Rule Cuba 2000 2004 - Apr Sun>=1 0:00s 1:00 D ...in the next bundle of changes for clarity. --ado -----Original Message----- From: hsv@tbbs.net [mailto:hsv@tbbs.net] Sent: Sunday, December 07, 2008 12:19 To: tz@lecserver.nci.nih.gov Subject: Cuba 2004-2006 This looks queer: Rule Cuba 1998 2003 - Oct lastSun 0:00s 0 S Rule Cuba 2000 2006 - Apr Sun>=1 0:00s 1:00 D Rule Cuba 2006 max - Oct lastSun 0:00s 0 S I take the foregoing for something like this: ... 2003 Apr Sun>=1 0:00s 1:00 D 2003 Oct lastSun 0:00s 0 S 2004 Apr Sun>=1 0:00s 1:00 D 2005 Apr Sun>=1 0:00s 1:00 D 2006 Apr Sun>=1 0:00s 1:00 D 2006 Oct lastSun 0:00s 0 S ... but at those Aprils in 2005 and 2006 there is no real shift. Is this right?