Festival in Leiden, Netherlands
On October 3 Festival in Leiden, Netherlands is held. Leidens Ontzet - tradition since 1886 in honor of the end of the siege in 1574. This october event in the first decade of the month is annual.
Bonaire Flag Day on September 6 (The flag of Bonaire was adopted in 1984);
Opening of carnival on November 11 ("Karneval"/"Fasching"), on 11-11, at 11:11. (Germany, the Netherlands, and other countries);
Sint Maarten's Day on November 11 (Sint Maarten, Kingdom of the Netherlands);
Second day of Christmas on December 26 (Western Christianity. Public holiday in the Netherlands, Poland, Norway);
Engineer's Day in Netherlands on March 18 (Third Wednesday of March);