April 30...

Valborgsmässoafton and the Swedish Kings birthday today Thursday 30 April.

Walpurgis Night (Walpurgisnacht) is a traditional religious holiday of pre-Christian origin, celebrated today by Christian and non-Christian communities as well, on April 30 or May 1

http://en.wikipedia.org/wiki/Walpurgis_Night
http://sv.wikipedia.org/wiki/Valborgsm%C3%A4ssoafton

Carl XVI Gustaf (Carl Gustaf Folke Hubertus), född 30 april 1946, born 30 April 1946.
http://en.wikipedia.org/wiki/Carl_XVI_Gustaf_of_Sweden
http://en.wikipedia.org/wiki/Swedish_Royal_Family

Photos from internet.