You can find information on the EU directive in the link below.
European Working Time Directive Opting out?
EU countries also have their own regulations. Spain also has collective agreements. Information on Spain posted below. If reader needs further information, they could visit one of the main labour unions or talk with a labour lawyer.
Full time: Spain 9 hours per day, 40 hours per week. Legislation. 40 hours per week, which is above average collectively agreed working time. 80 hours per year. Requires collective agreement or agreement by employee. Increased pay rate (average 18%) or time off in lieu, by collective agreement.
Part time: Provided for in individual contracts. Limited to 15% of working time (up to 60% by collective agreement).