As can be expected Billed Bladet's coverage of the confirmation is pretty extensive!
Summary of an whole appendix in Billed Bladet #21, 2013.
Written by Trine Larsen who has a special relationship with that branch of the DRF.
As you know Nikolai, age thirteen, was confirmed at Fredensborg palace chapel, as is tradition in the DRF.
Before that he and his class had been taught about the confirmation at Garnisons Kirke. The same church to which the kindergarten, Vincent, Isabella and Josephine is attending, belongs.
It was the royal confessionarius the likable Erik Normann Svendsen who performed the confirmation.
At noon there was the show for the press at the stairs, with the dachshunds entertaining and all...
Here Nikolai was sporting the Rolex watch he recieved from his mother, Martin Jørgensen and Felix. He was also looking dapper with his Burberry tie.
When the family went inside, Nikolai was in the lead with his mother and bonus-mother, Marie forming the rearguard. It was here bette Henrik, who was holding both Joachim and Marie's hand decided to take some leaps - and a lively child in one hand, stillettos on the feet and walking up stairs can be complicated, so our Marie almost lost her balance but fortunately Alexandra secured her with a good grip.
Then it was time for lunch with the family and guests, 34 in total. Little Athena was there too, there is a picture of her sitting in her seat in the car next to Marie. It is presumed she took a nap during the confirmation.
Prince Edward and Sophie who stayed at M&F at Amalienborg, drove in the same escorted cortege to Fredensborg as M&F, but not in the same car. The twins stayed at home at Amalienborg.
Mary was indeed wearing a light dress with a nice hat in what looks to me to be in the same hue as the dress.
During the lunch Joachim gave a heartwarm speech to his son. (He is reportedly very good at giving such speeches).
After the lunch Nikolai and a couple of relatives went outside. Christian being among them. In contrast to the others Christian, being the youngest, had by now completely dispenced with the formalities and was wearing light summer pants, a shirt hanging out and a tie that was still holding on to his neck.
The lunch ended in the early afternoon, but the celebrations didn't!
In the evening there was a party for Nikolai in downtown Copenhagen at Gallery Asbæk, with food delivered from an Italian restaurant.
Here some 50 guests were invited and the dresscode was much more informal.
First to arrive was Nikolai with his mother, brother and bonus-dad, who appears to have misplaced his razor, with Felix looking distinctly stylish!

Alexandra was wearing a grey-bluish assymetric lace-like dress cut above the knee. With long lace see-through sleeves. - She pulled that one off well, methinks.
Next to arrive were Joachim and Marie, who strolled from Amalienborg on that lovely evening. Marie wearing a low-cut knee-long light sleeveless dress, with lace-thingies. Now, Joachim is a gentleman and as such he doesn't know what "casually informal" is, so he is forgiven... He was wearing red pants, a blue shirt with no less than two bottons unbottoned (yes, he was practically naked!) and a dark jacket.
M&F arrived later. Frederik knows perfectly well what "casually informal" is, so let's skip him. Mary was wearing a dark green simple dress with short sleeves and cut below the knees looking very stylish.
(Yeah, yeah, bear with me. - I'll provide some scans later, but it's fun to attempt being a fashion-reporter

).
Here Nikolai recieved a present from Billed Bladet by Trine Larsen, it was something for his interest in parkour. And team JiYo, who is the best parkour team in DK at present entertained and demonstrated what the sport is all about.
Here it was Alexandra's turn to give a warm and moving speech for her son.
Later on there was dancing.
The guests were primarily friends of Joachim and Alexandra and her family from Hong Kong.
There is no mentioning of the Regent Couple, nor Prince Edward, so I presume they weren't around.
ADDED. The dresses:
https://www.box.com/s/dyqg3ilwalskkaqdhqif