>>23418223rd of May 1791, Poland's constitution, first one in Europe, second one in the world. It was a really nice one, very progressive, overall good one, sadly, few years later we were removed from the maps for the next 123 years, which leads to another one of our most important date, 11th of november 1918, end of WW1 and independence for our country. Those days are the most important ones for our coutry, both are our national holidays
Nothing wrong with you not knowing that, I think a lot of Poles do not know the year date as well