The mayor has resigned on March 1.

Vertaald door AI (EN). Toon origineel (NL)

It seems that you mean the word "faanvaard" as "leave" or "absence." If the mayor has taken leave on March 1, it means that he or she is temporarily unavailable to carry out the duties of the office. This can have various reasons, such as personal issues or illness. In that case, it is common for an acting mayor or another position within the municipality to take over the responsibilities during the absence. Do you have specific questions about this topic?