Thousands of people still occupy Madrid's main square, Puerta del Sol, after several days of protest about the government's poor political engagement with the electorate.
It is being referred to as the beginning of a movement in a country that has a youth unemployment rate of up to 45%.
Spain holds regional and municipal elections this Sunday, and campaigners want to be part of the political debate, saying their voices are not being heard.
Protestors have called on people not to vote tomorrow for the two main parties, the Socialists or the centre-right opposition Popular Party.
The occupation of Madrid's Sol, and the centres of 50 other Spanish towns and cities, has been declared illegal by the Spanish government.
It says there is a moratorium during which there should be no rallies connected with the government the day before an election.
Madrid's Sol is regarded as the centre of Spain.
Meanwhile, Spanish people living in Ireland will meet at The Spire on Dublin's O'Connell Street at 2pm tomorrow to join the silent protest.
Similar protests will take place in other centres of Spanish population around the world.
