The working hours, as a very important life part of most of the economically active people, are a significant indicator of the job market's flexibility. The first part of this thesis deals with the economic analysis of an individual person's time, forming of the labour supply and demand, and State's interference with job market. Afterwards follows the outline of the historical development of working hours, with the origins and progression of a regulation of this area. The third part is focusing on the legal form of working hours in the Czech Republic, including regulation of breaks, working hours' set out, privilege leave and special arrangements for a certain groups of employees. The next part analyses unusual working modes that are helpin...