The ad hoc module on work organisation and working time arrangements was included in the Labour Force Survey (LFS) and carried out in 2004. For a detailed evaluation of the ad hoc module see the publication, Eurostat (2006):"Final report of the task force for evaluating the 2004 LFS ad hoc module on work organisation and working time arrangements". The data cover all employees aged 25-49. The totals for the EU-25 referred to in the text and included in the figures and tables exclude Bulgaria and Romania since the data relate to period before these two joined the EU. There are no data for Bulgaria, the Czech Republic, Latvia, Lithuania, Poland, Sweden, and Croatia. In addition, there are no data in the following cases: a) Working arrangements by household circumstances: Denmark, Finland, Sweden, Norway and Switzerland; b) Employees working weekends and at night and convenience for personal life situation: Germany, Netherlands, Romania, Sweden, Norway and Switzerland.