Varies The birthday of the President of Iceland, (currently the 26th of June) January 1 New Year’s Day Varies Good Friday Varies Easter Varies (first Thursday after April 18 First Day of Summer May 1 International Workers’ Day Varies Pentecost Varies (First Sunday in June) Sailors Day June 17 Icelandic National Day November 16 Icelandic… More Official Iceland Flag-Flying Holidays