On April 19, 2023, King Willem-Alexander, Queen Maxima, Princess Amalia, Princess Ariane, Princess Beatrix and Princess Laurentien attended the King's Day (Koningsdag) concert at the RTM Stage in Rotterdam. Every year, the concert is held in the county where the Dutch Royal Family will celebrate King’s Day. The date of King's Day marks the birth of King Willem-Alexander, which is April 27.