In 2004, the Swedish parliament voted to make it a public holiday, which may cause people to become more interested in celebrating it. The final decision took decades to reach − various proposals had been discussed under a succession of governments.
The last time people in general took an active interest in Sweden as a nation-state was at the turn of the century, around 1900, when national-romantic winds were blowing through the country and folklore societies and local history museums were established. It was then that 6 June first became a day of celebration.
text from http://sweden.se/traditions/national-day/
Swedens National anthem: Thou old, thou free ("Du gamla, du fria[/track]") with English translation
Text from the you-tube page: