Why are the flags of the European Union hanging on 9 May? Today's an crucial holiday

Zdjęcie: 9 maja obok flagi Polski wisi flaga Unii Europejskiej. 27 państw świętuje ważne wydarzenie


On Friday 9 May next to the Polish flag, the flag of the European Union hung. On that day, nearly 30 countries celebrate an crucial event which had immense consequences for Europe's economical and social development.