The Organisation of School Time in Europe. Primary and General Secondary Education – 2017/18

Eurodyce:

The school calendar contains national data on the length of the school year, the start and the end dates of each school year, the timing and length of school holidays and the number of school days. It covers both primary and general secondary education and key points are illustrated by comparative figures. The information is available for 37 countries.

Some variations in the number of the school days across Europe

The number of school days varies between 162 days in France (except in upper secondary education) and 200 days in Denmark and Italy. In around half the countries, it is between 170 and 180 days; in 15 countries, the number varies between 181 and 190 days. In general, the number of school days is the same in primary and secondary education but there are a few exceptions: in Belgium, France (upper secondary education) and Bosnia and Herzegovina (Republica Srpska), the number of schools days is higher in secondary education than in primary.
The opposite (fewer school days in secondary education than in primary education) is observed in Ireland, Greece, Cyprus and the Netherlands.