Designer: Fabienne Delvigne. It is the “Flavia” design.
Previously Worn: Nov 21, 2018; February 5, 2018; October 13, 2015; October 30, 2014; October 15, 2014; March 19, 2014; November 12, 2013
November 22: Crown Princess Victoria and Crown Prince Haakon donned colourful hats on a visit to a mangrove reforestation development program in Kenya.
November 24: Queen Máxima attended the jubilee of the multicultural network for government officials at the ministry of Interior affairs in her muted burgundy melusine felt fedora. The combination of hat with sienna dress, cranberry coat and oxblood leather gloves and boots is a close-tonal one that works unexpectedly well.
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Designer: Fabienne Delvigne. It is the “Borsamalia.” Natan dress, Valentino cape.
Previously Worn: Oct 9, 2019; Oct 2, 2019; Jan 31, 2019
November 24: Queen Mathilde welcomed Mr. Ignazio Cassis and Mrs Paola Rodoni Cassis, the President and the first Lady of the Swiss Confederation, on state visit to Belgium in a repeated a cranberry felt brimmed hat with high, angular crown simply trimmed with a slim hatband knotted on the right side.
Designer: Dior (my guess is Stephen Jones for Dior). Outfit, bag and shoes all by Dior.
Previously Worn: Dec 16, 2019
November 30: Queen Máxima opened an exhibition on royal embroidery, stories and craftsmanship in the Tilburg Textile Museum in a repeated toque hat of safron and navy printed ikat silk.
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Designer: unknown. Dress and skirt by Natan.
Previously Worn: Dec 6, 2018
December 1: Queen Máxima repeated an emerald braided straw pillbox to attend the 70th anniversary of an organization supporting international education.
Designer: unknown. Dress and coat by Oscar de la Renta.
Previously Worn: May 27, 2021
December 6, 2022: Queen Margrethe repeated her red and aubergine boater hat for a visit to the Danish Church of St Katharine’s in Camden for a celebration service for her Golden Jubilee.
Designer: Mathilde Førster
Previously Worn: Nov 11, 2021; Oct 5, 2021; Apr 23, 2021; Nov 27, 2020
December 6: Prince Alexander was christened in Moscow at the Cathedral of Christ the Saviour. Princess Victoria wore a pale grey disc percher hat trimmed with feathers. Grand Duchess Maria of Russia wore one of her signature kokoshnik halo headpieces, this one in black with a white floral spray on the side.
December 10: For the Nobel Peace Prize Ceremony, Queen Sonja repeated a teal felt pillbox with ribbon trim and back bow.
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Designer:
Previously Worn: Dec 10, 2015; May 9, 2015
Crown Princess Mette Marit wore a red double crepe covered bandeau headpiece with bow across the back.
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Designer: Jane Taylor Small Bow Band. Coatdress by Catherine Walker.
Previously Worn: This headpiece is new.
Which hats here catch your eye?
Images from Getty as indicated
Royal Hats 
I’m mulling over Max’s mix of tones as I think she may have taken it one shade too far. But it’s a successful look overall. And I still love the gold toque with the blue and gold ensemble.
Margrethe’s repeated boater is still a delight, and she always looks so pleased with it.
It’s good to see Mette-Marit in a bandeau instead of a headband for this occasion. Sonja wears teal beautifully, and the satin trim gives some polish to the simple style.
And a very sweet photo shared by Nicholas and Alina of Romania
Queen Maxima looked wonderful, loved her choice of hats.
Some good looks here, and my favorites are Máxima’s cranberry shades outfit and fedora, Grand Duchess Maria Vladimirovna’s kokoshnik headpiece with her lace patterned coat, and Mette-Marit’s tomato red bandeau.
While I also like Máxima’s gold and blue outfit with the toque, I realized this time my real problem is (surprisingly) not the matching material, but the construction of this one; the draping of the fabric just doesn’t feel clean enough, especially after seeing all the stunning turbans Philip Treacy has been showcasing on his Instagram in the last few weeks. I would also like to see this one worn with her hair down or with a side chignon.