Poland operates on Central European Time (CET) during winter months, which is 1 hour ahead of Coordinated Universal Time (UTC+1). During daylight saving time, observed from the last Sunday in March to the last Sunday in October, Poland switches to Central European Summer Time (CEST), which is UTC+2.
All of Poland follows the same timezone. Major cities including Warsaw, Kraków, Łódź, Wrocław, Poznań, and Gdańsk all observe the same time. Poland shares its timezone with Germany and Czech Republic to the west.
Poland is home to the world's largest castle by land area—Malbork Castle, a UNESCO World Heritage Site built by the Teutonic Knights. The country has 17 Nobel Prize winners, including Marie Curie, who was the first person to win Nobel Prizes in two different sciences (Physics and Chemistry).