If the roots are hanging out the bottom, then you may need to repot, but they do quite like being a bit potbound, so only repot if it obviously needs it. That said, there does seem to be rather a lot of top growth in relation to the pot, so perhaps a larger one would be better. Not sure if John Innes No. 2 compost is available in Denmark, but that's what I'd use to repot.
Otherwise, this palm is frost sensitive, particularly when young, so if you have cold winters (and I think you do) you will need to bring it indoors or into a greenhouse over winter.

THANK YOU VERY MUCH,AND I WILL BRING IT INDOORS BECAUSE WE HAVE VERY COLD WINTERS.THANK YOU FOR THE TIP

And depending on how warm it is now, don't leave outside overnight till all risk of frost is past. Nice, healthy looking plant.

Mirelusha:

Your Phoenix canariensis - Canary Island Date palm needs to be transplanted into a larger pot. They are not too picky as to the type of soil...as long as it's good draining. Roots can be pruned during warm weather...which is a good idea for this palms species, because it has a huge root system.

In San Diego, CA where I live they grow to be a huge tree of more than 85 feet/ 26 meters tall.

Delonix is right, but I really wouldn't worry about the root pruning, Mirelusha - where you live, it will never get that large!

Bamboo:

Very true...in a pot it will probably not grow larger than 6 feet/ 2 meters tall. However, even in a pot the roots will grow out the holes pretty quickly!