The unions are also protesting against planned public sector job cuts and privatisations.
German police used pepper spray against thousands of anti-capitalist protesters in Frankfurt.
Trains and ferries were cancelled and hospital staff left their posts in Greece on Wednesday.
Spaniards marched to protest deep austerity, corruption & the privatisation of public services.
Rancorous vote on constitution makes Egpytians worry about the economy.
Police and protesters clashed in Spain and Italy on Wednesday as millions of workers went on strike.