All official holidays in Finland are established by acts of Parliament. The official holidays can be divided into Christian and Non-Christian holidays. The main Christian holidays are Christmas, Epiphany, Easter, Ascension day, Pentecost and All Saints Day. The non-christian holidays are New Year's Day, May Day and Midsummer Day.

In addition to this all Sundays are official holidays but they not as important as the special holidays. The names of the Sundays follow the liturgical calendar and they can be categorized as Christian holidays. When the standard working week in Finland was reduced to 40 hours by an act of Parliament it also meant that all Saturdays became a sort of de facto public holidays, though not official ones. Easter Sunday and Pentecost are Sundays that form part of a main holiday and they are preceded by a kind of special Saturdays.

Tradition

Celebrating major holidays starts early in Finland. Christmas Eve and Midsummer Eve might very well be the single most important holidays during the entire year for Finns. Surprisingly they are not official holidays, they are however de facto full holidays. They hold this de facto status partly due to legislation but also due to the fact that most employment contracts provides for these days as full holidays. A number of the less important main holidays are also preceded by de facto half days, meaning that they only are half working days or school days. These are Epiphany Eve, Maundy Thursday, the day before May Day, the day before Ascension Day, the day before All Saints Day, and New Year's Eve.

The Finnish calendar also provides for special flag days. A day's status as a flag day has no formal link with an eventual status as an official or as a de facto holiday.

Finland has an official National Day, December 6. Some minor observances are also denoted in the Finnish calendar, though they have not been judged worthy of either holiday or flag day status.

See also: National Day of Finland, Flag days in Finland, Namesdays in Finland, Tourism in Finland