Today, October 15, 2025, Denmark is flagging for Hans Kongelige Højhed Kronprins Christian, a royal birthday celebration in honor of Crown Prince Christian. This is an official Danish flag day, where the Dannebrog flag is raised to mark the special occasion.

Why Denmark flags on this day

Denmark raises the flag on official flag days to signify national pride, respect for the royal family, and remembrance of important historical and cultural events. Birthday celebrations of members of the royal family are among the key reasons for flagging. The Danish flag, Dannebrog, serves as a unifying national symbol, expressing historical, cultural, and societal values.

Typical official flag days

Official flag days include:

• National holidays like Nytårsdag (New Year's Day) and Grundlovsdag (Constitution Day)
• Royal birthdays and anniversaries, such as those of Queen Margrethe II, Crown Prince Christian, and other members of the royal family
• Historical commemorations like Danmarks besættelse (occupation) on April 9 and Danmarks befrielse (liberation) on May 5
• Religious holidays such as Langfredag (Good Friday), Påskedag (Easter), and Juledag (Christmas Day)
• Regional national days, for example, Greenland's and the Faroe Islands' national days, where their respective flags are also raised.

Thus, the flag today represents respect and celebration of Crown Prince Christian's birthday, as part of Denmark's tradition of official flag days.