All official holidays in Finland are established by acts of Parliament. The official holidays can be divided into Christian and secular holidays, although some of the Christian holidays have replaced holidays of pagan origin. The main Christian holidays are Christmas, Epiphany, Easter, Ascension Day, Pentecost and All Saints Day. The secular holidays are New Year’s Day, May Day and Midsummer Day.

In addition to this all Sundays are official holidays but they are not as important as the special holidays. The names of the Sundays follow the liturgical calendar and they can be categorised 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.

Retail stores are prohibited by law from doing business on Sundays, except during the summer months (May through August) and in the pre-Christmas season (November and December). Business locations that have less than 400 square meters of floor space are allowed Sunday business throughout the year, with the exception of official holidays and certain Sundays, such as Mothers’ Day and Fathers’ Day.