Edited sentence: (This is why Iceland does not observe summer time.) On the other hand, it makes sense to keep the same time in all of the Central European Time zone, so even though summer time doesn't add more daylight in the summer so far to the north, it is implemented in Sweden, Norway and Denmark.Especially north of the polar circle, where the sun never sets in the summer and never rises in the winter, summer time seems redundant.Summer time make little sense in the Scandinavian countries, since during summer, there is already much more daylight than during winter, with the sun rising earlier in the morning (usually before the morning, during night) and setting very late at the night.Sweden and Denmark are EU members and Norway is implementing most EU directives through the EEA treaty, so any directive that is not implemented would also spark possible tensions with the rest of the EU countries