Danish employers would like to know not only your professional skills but also your personal information, because they believe that makes an impact on how you will thrive at work and thus if you will stay in the job. It is normal to include your age, if you are married and have children, and what you like to do in your spare time. If you are considering moving to Denmark with your spouse, you might want to tell your potential employer in Denmark that your family is interested in relocating too. If you are already living in Denmark because your spouse found work, please include that. To a Danish employer this is important information because you already know about the Danish mentality and culture – you are more likely to stay in the job!
You may choose to include this information as a final part of your CV, perhaps titled: About me, or Interests.