Happiest people in the world

http://www.happinessresearchinstitute.com/

According to Sustainable Development Solutions Network's 2013 report on the World Happiness, the happiest people live in Denmark. Denmark, where it is sunny only 36.6% of a daylight hours, and cloudy other 63.4% of the time (climatems.com). So, how is it possible, that citizens of cold and harsh northern country are remain to take over the very first place in the happiest people "contest"?
http://www.visitdenmark.co.uk/ says that it is all about the work-life balance. People in Denmark work 37 hours a week, and have more then 5 weeks of holidays during the year. "This means that leisure time is a huge part of the Danish culture, which is optimised in a great number of ways, let it be social gatherings, sports, taking a course, or joining the local book or theatre club", website says. Social activities and impovised "get-together" with others are named "hygge", which means a cosy intimate meeting with family and friends. 

http://eurotaxi.mobi/

Another  reason Danes are the happiest people in the world is an advanced social development of the country. Denmark was one of the first countries to establish social services. "Social welfare programs include health insurance, health and hospital services, insurance for occupational injuries, unemployment insurance and employment exchange services, old age and disability pensions, rehabilitation and nursing homes, family welfare subsidies, general public welfare, and payments for military accidents. Maternity benefits are payable up to 52 weeks (http://www.nationsencyclopedia.com). Danish government's spending on children and elderly is higher than any other country. Denmark gives its people sense of security, and makes sure that if they get unemployed or ill, government will help them get back on their feet.
With all these incredible social features and beautiful nature of the north around, no surprise they are the happiest people in the world.