Here is what happens (on an administrative level) before your defence:
Art. 11.4. To be defended, the thesis must first be submitted to the thesis director, and, if applicable, the thesis co-director, and also to the members of the jury for approval and to permit the drafting of the thesis report by the thesis director. The thesis, the thesis report approved by all the jury members and that concludes that the thesis can be defended, as well as the chosen jury, are submitted for the approval of the director of the doctoral program concerned. The printed version of the thesis must be accompanied by an electronic version.
5. At least fifteen business days before the scheduled date of the thesis defence, the director of the doctoral program concerned must provide to the Dean's Office of the doctoral student’s host Faculty, a copy of the thesis and the thesis report, the jury’s composition and its approval.
For all of this to take place, you must register for your defence at least 40 working days (8 weeks, excluding public holidays) before your planned defence date. Your final thesis and all required paperwork must reach the Dean’s Office no later than 20 working days (4 weeks, excluding public holidays) before the planned defence date. External jury members must submit their feedback (maximum one page) no later than 20 working days (4 weeks, excluding public holidays) before the planned defence date.
Please note that programme coordinators and programme (co-)directors may be unavailable, particularly during holiday periods. If you are working to tight deadlines, you are therefore advised to contact them well in advance to confirm their availability for the required date.