If you´re spening Christmas in Reykjavik, make sure you know which places (restaurants, shopping malls etc.) are open during holidays. Here´s a list of places that may come handy when you´re planning your time in town. Many restaurants are closed on the 24th and 25th so check out the list so you know where to go if (and when) you get hungry. Merry Christmas and enjoy Reykjavik! 

Full list: http://www.visitreykjavik.is/opening-hours