Time zone changes from version 2006m3 to 2006n1:
Date : Tuesday October 24, 2006 1:00 CDT
File : 2006n1.txt

* I guessed on that Cuba would not implement any GMT transitions
this year either in version 2006m3. It probably was as good a guess
as any, but now we have authoritative information from Cuba, that
they will continue US-like DST from Last Sunday of October. So I 
have to revert Cuba to 2006m2 again.

An article in GRANMA INTERNACIONAL claims that Cuba 
will end the 3 years of permanent DST next weekend, see 
http://www.granma.cu/ingles/2006/octubre/lun16/43horario.html
(note there are both spanish and english versions of this article).

A few quotes:

"AFTER three years of remaining on a summer daylight savings time 
schedule, Cuba’s National Electrical Union decided to go back to 
its normal schedule during this month of October. 

On Saturday night, October 28 going into Sunday, October 29, 
at 01:00 , watches should be set back one hour – going back to 
00:00 hours – returning to the normal schedule, which in Cuba is 
known as the winter schedule.

...

In Cuba, because of electricity generation shortages, it was decided 
to maintain the summer daylight savings schedule for three years; 
however, the country is now in a position to produce all the energy 
it needs, which is why it was decided to go back to the regular 
schedule."

Granma is the official newspaper of the Cuban Communist Party, so named
after the vessel that took Fidel Castro back to Cuba to start the 
revolution, see for instance
http://en.wikipedia.org/wiki/Granma_%28newspaper%29

Regards, Jesper Nørgaard Welen

GMT = Greenwich Mean Time
DST = Daylight Saving Time
WTE = World Time Explorer

World Time Explorer 1.8:
http://www.worldtimeexplorer.com/index.html
e-mail: support@worldtimeexplorer.com
this text: http://www.worldtimeexplorer.com/2006n1.txt
... see also http://www.worldtimeexplorer.com/2006m3.txt

TZ Database:
http://www.twinsun.com/tz/tz-link.htm
ftp://elsie.nci.nih.gov/pub