diff --git a/transactions.py b/transactions.py
index 2f31a4e..204811e 100644
--- a/transactions.py
+++ b/transactions.py
@@ -6,6 +6,7 @@ from urllib.request import urlopen
 from fints.client import FinTS3PinTanClient
 import csv
 import json
+import sys
 
 # --------------------------------------------------
 # Konfiguration laden
@@ -65,7 +66,42 @@ base_dir = Path.home() / "Transaktionen"
 if not base_dir.exists():
     base_dir = Path(__file__).parent / "Transaktionen"
 
-year, week, _ = datetime.now().isocalendar()
+# --------------------------------------------------
+# Kalenderwoche bestimmen
+# --------------------------------------------------
+
+if len(sys.argv) == 3:
+
+    year = int(sys.argv[1])
+    week = int(sys.argv[2])
+
+else:
+
+    year, week, _ = datetime.now().isocalendar()
+
+# Montag der Kalenderwoche
+
+start_date = datetime.strptime(
+    f"{year}-W{week:02d}-1",
+    "%G-W%V-%u"
+).date()
+
+# Sonntag der Kalenderwoche
+
+end_date = start_date + timedelta(days=6)
+today = date.today()
+
+if end_date > today:
+    end_date = today
+
+if start_date > today:
+
+    print(
+        "Die angeforderte Kalenderwoche liegt "
+        "vollständig in der Zukunft."
+    )
+
+    sys.exit(1)
 
 year_dir = base_dir / str(year)
 csv_dir = year_dir / "csv"
@@ -108,8 +144,16 @@ with client:
 
         transactions = client.get_transactions(
             account,
-            start_date=date.today() - timedelta(days=7),
-            end_date=date.today()
+            start_date=start_date,
+            end_date=end_date
+        )
+
+        print(
+            f"Lade Transaktionen für KW{week:02d}/{year}"
+        )
+
+        print(
+            f"Zeitraum: {start_date} bis {end_date}"
         )
 
         for transaction in transactions: