9 May was Europe Day. According to EC Regulation 1828/2006, the managing authorities of projects involved in Interreg programmes are obliged to fly the European flag in front of their premises for one week starting 9 May.
Europe Day symbolises peace and unity in Europe. It is celebrated in commemoration of the Schumann Declaration on 9 May 1950, which paved the way for the creation of the ECSC and is considered to be the founding moment of the European Union.
EC Regulation 1828/2006 can be found in the Document Library.
Read more about Europe Day here.