GMT
roulishollandais
... Just to be accurate :
14h30 local time in France (metropole=Paris) is
12h30 UT and also
00h30 GMT
Rather a surprise to us brits, who are told that they use GMT half the year.
More specifically, from wikipedia
Historically the term GMT has been used with two different conventions, sometimes numbering hours starting at midnight
and sometimes starting at noon. The more specific terms UT and UTC do not share this ambiguity, always referring to
midnight as zero hours. Astronomers preferred the latter GMT convention in order to simplify their observational data
so that each entire night was logged under a single calendar date.