National festival in our summer city

Iceland's National Day, June 17, is celebrated every year to celebrate the establishment of a republic in Iceland in 1944. Before that time, however, the day also had a place in the hearts of Icelanders, because June 17 was Jón Sigurðsson's birthday (1811-1879), Iceland's main hero of independence. The day was chosen as a national holiday to honor his contribution to the Icelandic struggle for independence from Denmark. The first records of a celebration on June 17 are from the year 1907, when Jón's birthday was commemorated with a trumpets and speeches at Austurvöllur in Reykjavík; the gathering numbered 4-6 thousand people, or about half of all townspeople.

On June 17, 2022, family parties will be held throughout the town. Hljómskálagarður, Grafarvogur, Breiðholt and Klambratún.
The traditional Icelandic National Day celebrations in Reykjavík will be broadcasted live on Ruv the national tv station
The programme starts with the chiming of all church bells in Reykjavík, followed by a mass in Domkirkjan Cathedral. At 11:10 the Icelandic government's National Day ceremony starts at Austurvöllur Square, followed by a parade from Austurvöllur to Suðurgata Cemetery, where the Chairman of the City Council lays a wreath of flowers on the grave of Jón Sigurðsson
For those who wanna walk arround.  You might be able to catch a glimpse of pop-up events including brass bands choirs, circus artists and more in the Reykjavik downtown area or listen to a dj playing at Klambratún.
On June 17, 1944, the Republic of Iceland was formally established and Iceland became independent after being under Danish rule. The day has been celebrated as the Icelandic National Day ever since.
June 17 was chosen because it is the birthday of Jón Sigurðsson (1811-1879), the leader of Iceland’s independence movement.
Usually, the National Day is celebrated across the country with parades led by marching bands and scouts following as color guard. 
Ceremonies often include an address or poetry reading by a woman dressed as fjallkonan ('The Mountain Woman'), wearing Iceland’s national dress.
Fjallkonan represents the Icelandic spirit and nature and became a symbolic figure in Iceland’s fight for independence.