For a rainy Prinsjesdag on September 15, 2015, Queen Máxima and Princess Laurentien wore Jan Taminiau and Missoni gowns, respectively. 

The Queen's short-sleeved gown was a very pale pink with floral beaded details in burgundy that were hand embroidered. She also wore a pair of matching burgundy gloves with the ensemble. True to her vibrant personality, Máxima was wearing a pair of matching burgundy beaded drop earrings; sadly, these earrings are still UFO. 

Queen Máxima's floral headpiece was also by Jan Taminiau and matched her gown perfectly. Princess Laurentien's cream hat was by Eudia. 

Laurentien's green long-sleeved gown featured a cape and a chevron design from top to bottom. Of course, the orange Order of the Gold Lion of the House of Nassau stood out against the green (which actually found more flattering together than I would have thought). 

Prinsjesdag (also referred to as Prince's Day in English) is an annual holiday in the Netherlands where the Dutch monarch addresses a joint session of the Senate and House of Representatives for a speech from the throne. It takes place in the afternoon at the Ridderzaal. In 2018, it will take place on September 18.

After the King addresses the joint session, he, the Queen and his brother, Prince Constantijn and sister-in-law Princess Laurentien appear on the balcony of The Noordeinde Palace to wave to well-wishers who have gathered below.