What is the origin of Swedish National Day?

1523 On June 6th, King Gustav Vasa of Sweden was crowned, the Kalmar Union was officially dissolved, and Sweden officially became an independent kingdom. (Denmark's National Day is June 5th, for the same historical reason. )

1On June 6th, 809, Sweden promulgated the third amendment to the Constitution, which stipulated the form of government, and its main contents and spirit are still used today, which is the basis of modern Swedish politics.

1893 Arthur Joselius, the founder of Skansen Park and Nordic Museum in Stockholm, held a series of banquets to commemorate the national history in order to raise funds for the construction of Skansen Park. According to unofficial history's records, the banquet lasted for many days, but it didn't rain only on June 6th, which was also the day with the largest number of guests. In Skansen Ji 1893, Jose Julius wrote: "Gustav Day, a national commemorative celebration held in Skansen Park, should be designated as Swedish National Day in the future."

Starting from 19 16, June 6th was designated as "Flag Day" in Sweden.

1983, Swedish Minister of Justice Carl Arthur Petrie signed a bill to designate June 6th as the official national day of Sweden.

In 2004, Swedish legislation decided that National Day was a national holiday.

That's all I remember. I hope it helps you. The answers on the first and second floors are also good, but there are some problems in translation.