CHancuff wrote:
UTC variation and begining and ending dates of DST (if observed) would be great.
I answered only the places I can comment on.
BASSAS DA INDIA
This rock is below water half of the time! If any inhabitants have been there, I do not think they observe DST on a regular basis! ;-)
CLIPPERTON ISLAND
Clipperton is uninhabited since the 30's (at least regularly; some missions have gone there, for one or two months, but I do not know which time they observe; I think it will be the normal timezone -0700 for Frenchs, Mexico timezone for Mexicans and PST/PDT for Americans; but these are just guesses). I am still looking at further informations.
EUROPA ISLAND
Europa Island is operating a meteo station, with sometimes a garrison of some militaries. Since they are dependant from Reunion, they certainly use(d) Reunion's timezone, +0400 all year round. No official informations.
JUAN DE NOVA ISLAND
This small island is uninhabited (though it has been). Same as for Europa, I figure that since the guys extracting guano and the meteo/military people are coming from Reunion, they should operate at +0400. No official informations.
TROMELIN ISLAND
Again, this small island is operating a (very important) meteo station. People going there are coming from Reunion or Mauritius, thus their clocks are at +0400 all year round. No official informations.
BRITISH INDIAN OCEAN TERRITORY
See the file asia (Indian/Chagos)
FRENCH SOUTHERN AND ANARCTIC LANDS
See the file antartica (Indian/Kerguelen and Antarctica/DumontDUrville). I have no information (still investigating) about the timezone when St Paul and Kerguelen were whale fishing stations (back in the 20's). Probably no DST, however!
GUERNSEY JERSEY
And Sercq? and Alderney? :-) I figure this is the same as UK time (since the begin of the century), but I have no official pointers.
MONTENEGRO
Same time as Yugoslavia (since the adoption of legal time over local mean time). Montenegro is not a separate state from Serbia (both form a federation, which is not recognized by the USA).
VATICAN CITY
Same time as Italy (Europe/Rome).
WESTERN SAHARA
See the file africa (Africa/El_Aaiun) Hope it helps, Antoine