Thousands of people still occupy Madrid's main square, Puerto del Sol, after several days of protest about the government's poor political engagement with the electorate.
The protest is being referred to as the beginnings 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. The campaign is recommending an 'en blanco' vote - spoiling votes, so as not to vote for any one political party.
Last night 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 said 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.
Spaniards elect 8,116 city councils and 13 out of 17 regional governments on Sunday when the ruling Socialist party is expected to take a drubbing over its handling of the economic crisis, before general elections scheduled for March 2012.
Spain has the highest jobless rate in the European Union at 21.3%. The collapse of the housing sector and a dive in consumer spending has hit young job seekers particularly hard, with 45% of 18-25s unemployed.
The protests have been organised over social media, and grow each evening to thousands, with a few hundred people camping out all night and during the day.
Spanish people living in Ireland will meet at The Spire on Dublin's O'Connell Street at 2pm on Saturday, and in other centres of Spanish population around the world, to join the silent protest.
