{"text_format":"1","workbook":"xlsx","n_sheets":2,"sheets":["Jan","Feb"],"not_rendered":{"charts":0,"images":0,"macros":1,"external_links":0,"defined_names":13,"comments":0,"pivot_tables":0},"unopened":[],"bounds":{"document_bytes":16777216,"sheet_cells":100000,"rows_first":2000,"rows_last":500,"rows_between":2000,"halvings":0,"cell_chars":16384,"cell_head_chars":4096},"cells_cut":0,"cells_raw":0,"read":"whole","date_system":"1900"}

{"sheet":"Jan","index":0,"n_rows":7,"n_cols":5,"rows_kept":7,"cut":false,"hidden":false,"merged":[[0,0,0,1],[1,0,1,1]]}
["Zeitraum",null,{"$f":"DATEVALUE(\"01.\"&MID(CELL(\"dateiname\",A1),FIND(\"]\",CELL(\"dateiname\",A1))+1,31))","v":"2025-01-01"},"bis",{"$f":"EOMONTH(C1,0)","v":"2025-01-31"}]
[]
[]
[]
[null,null,"Die Zelle C1 wird automatisch aus dem Blattnamen gebildet, hier also 01.01.2025. Beim Jahr nimmt die Formel offensichtlich immer das aktuelle Jahr."]
[null,null,"Wie bekomme ich es hin, dass sich das Datum aus dem Blattnamen und den Dateinamen bildet? Mein Dateiname heißt \"Datum 2024\""]
[null,null,"Das Ergebnis sollte also 01.01.2024 lauten"]

{"sheet":"Feb","index":1,"n_rows":1,"n_cols":5,"rows_kept":1,"cut":false,"hidden":false,"merged":[[0,0,0,1],[1,0,1,1]]}
["Zeitraum",null,{"$f":"DATEVALUE(\"01.\"&MID(CELL(\"dateiname\",A1),FIND(\"]\",CELL(\"dateiname\",A1))+1,31))","v":"2025-02-01"},"bis",{"$f":"EOMONTH(C1,0)","v":"2025-02-28"}]