The Dag van het Kasteel: “Day of the Castle” was celebrated on 1 June in the Netherlands. The first five visitors of De Haar Castle were therefore surprised with a Silver Ducat. The issue with De Haar Castle is the first in the new series “Dutch Castles”. In the series, each Silver Ducat depicts a different Dutch castle. De Haar Castle (Utrecht) and Heeswijk Castle (North-Brabant) have already been issued.