On October 26, 2020, Crown Princess Mary attended the presentation of Christmas Seal 2020 at Haraldsborg (Julemærkehjemmet Liljeborg) in Roskilde. Haraldsborg opened in January 2018 and is the newest of a total of five Christmas Seal Homes (Julemærkehjem). Illustrator Tomas Björnsson designed the 2020 Christmas seal.
Julemærkefonden (The Christmas Seal Foundation) is a Danish charity and it operates five so-called Christmas seal homes that provide service for vulnerable children. In order to finance its services, it issues a Christmas seal once a year.
Every year since 1904, the Christmas Stamp Foundation has issued the special Christmas Seal for the purpose of raising money for children residing at one of Denmark's five Christmas Stamp Homes. At each Christmas Seal Home, 1,000 children can stay and receive help in combating loneliness, bullying, social isolation and obesity. The Crown Princess is patron of The Christmas Seal Foundation.