What is "tangomarkkinat"

The Tangomarkkinat is the world's oldest tango festival. It is held early every July in Seinäjoki, Finland. As well as competitions to find the country's best tango singers, composers, and dancers, the festival features public dancing to live music provided by the best Finnish entertainers. Music for public dancing is not restricted to tango: it includes all the dance rhythms popular in Finland: but tango content must, according to the rules, be at least 40%.