Yesterday I wondered about the same outfit by the Queen for the Te Deum in the cathedral, the Abdication in the palace, the Investiture in the Parliament and the Défile at Palace Square.
But Queen Mathilde has indeed worn three different outfits as well. For the walk in the Warande Park the Queen wore a dress with a red flower print. For the evening appearance at the palace balcony and the fireworks the Queen wore a dress with a blue print. So three dresses as well, with an irregular interval seeing the long day program.