Institutions and EU Bodies of which employees work under the Staff Regulations (SR) have a similar set of leave rights. Each Institution or EU body has the legal freedom to interpret the SR corresponding anchors in the way they wish. This might lead to slight differences in their implementation. In the Commission in particular the SR is completed, regulatory speaking, by a Commission decision and further completed by implementation practices which might differ from service to service.
The annual leave entitlement is off two working days for each completed month of service meaning 24 working days per calendar year. These basic annual leave rights are complemented by additional ones depending on the age (1 to 6 days) or the grade (1 to 3 days) of the employee.
Beyond regular annual leave, there is a flat rate supplementary home leave of 2 and a half days for the purpose of visiting your home country for employees that benefit from the expatriation or foreign allowance; this means for any employee that has its place of origin/interest formally defined and recognized by the administration as being outside the country he/she works.
One could consider as a rule of thumb that employees take 6 calendar weeks of leave a year in addition to the Bank Holidays applicable in their place of work. Bank Holidays are by consensus between 17 and 19 days per calendar year in Brussels and Luxembourg. There is also some flexibility at the Commission in working during some Bank holidays. Indeed, for many years now there are about 2 or 3 specific Bank holiday dates per calendar year (typically to adapt for Easter or May holidays) where one can work and be compensated for (a day annual leave extra for a worked Bank Holiday).
Last but not least, these annual leaves and supplementary days from the employee rights can be carried over to the next calendar year for a maximum of 12 days. This is to ensure a proper/manageable service business continuity. Requests for carry-over of more than 12 days are rarely granted. Also each year Staff in the Commission lose leave rights (probably – no available data – one or two days on average). That is beyond work they might do on weekends / nonflexible Bank Holidays / during leave periods that do not generate additional rights or compensation in effect. The possibility exists to get compensation for working on weekends/holidays but is strongly conditioned in a way that is almost never effectively granted.
 Staff Regulations of Officials of the European Union and the Conditions of Employment of Other Servants of the European Union, laid down by Council Regulation (EEC, Euratom, ECSC) No 259/68(1), have been amended by Regulation (EU, Euratom) No 1023/2013 of the European Parliament and of the Council of 22 October 2013(2) (the ‘revised Staff Regulations’).
 Articles 42, 57, 58 and 61 of the SR and its annex V, articles 16 & 91 of the CEOS (second part of the SR text)
 Comission Decision on leave C(2013) 9051 final