Synchronize your watch with the country you are visiting as soon as you board the plane or cross the border to avoid confusion.
Most Europeans countries use the 24-hour clock (especially for train/plane timetables)!
Essentially, Europe spans three different time zones.
Greenwich Mean Time (GMT) includes Britain, Iceland, Ireland and Portugal.
Central European Time (CET) – GMT+1 hour - covers Austria, Belgium, Croatia, the Czech Republic, Denmark, France, Germany, Holland, Hungary, Italy, Luxembourg, Malta, Monaco, Norway, Poland, Slovakia, Slovenia, Spain, Sweden and Switzerland.
Eastern European Time (EET) – GMT+2 hour - includes Bulgaria, Cyprus, Estonia, Finland, Greece, Latvia, Lithuania, Romania, Turkey, and Ukraine.