How far in advance do I have to register my vacation?
In general, it is important that you always register your vacation in the calendar year for which the vacation days apply. In most companies, it is customary that an application for leave must be submitted at least 14 days before the actual start of the leave and the boss must approve it at least seven days in advance. However, your employment contract may also stipulate that you must register large parts of your vacation at a much earlier date.