1) September observance
Found on
https://www.crosswordclues.com/clue/prinsjesdag
Prinsjesdag ( Prince`s Day) is the day on which the reigning monarch of the Netherlands (currently King Willem-Alexander) addresses a joint session of the Dutch Senate and House of Representatives in the Ridderzaal or Hall of Knights in The Hague. The Speech from the Throne (Troonrede) sets out the main features of government policy for the comin....
Found on
http://en.wikipedia.org/wiki/Prinsjesdag
No exact match found.
