diff --git a/.github/workflows/update-dojo-date.yml b/.github/workflows/update-dojo-date.yml
new file mode 100644
index 0000000..f6d2e99
--- /dev/null
+++ b/.github/workflows/update-dojo-date.yml
@@ -0,0 +1,29 @@
+name: Dojo-Termine aktualisieren
+
+on:
+  schedule:
+    - cron: '0 4 * * 0'   # sonntags 04:00 UTC (~05-06 Uhr Berlin)
+  workflow_dispatch:
+
+permissions:
+  contents: write
+
+jobs:
+  update:
+    name: Termine aktualisieren
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Termine berechnen
+        run: python3 scripts/update_dojo_dates.py
+      - name: Änderungen committen
+        run: |
+          if [ -n "$(git status --porcelain index.md)" ]; then
+            git config user.name  'github-actions[bot]'
+            git config user.email '41898282+github-actions[bot]@users.noreply.github.com'
+            git add index.md
+            git commit -m 'chore: Dojo-Termine automatisch aktualisiert'
+            git push
+          else
+            echo 'Keine Änderung – nichts zu committen.'
+          fi
diff --git a/scripts/update_dojo_dates.py b/scripts/update_dojo_dates.py
new file mode 100644
index 0000000..64d3426
--- /dev/null
+++ b/scripts/update_dojo_dates.py
@@ -0,0 +1,131 @@
+#!/usr/bin/env python3
+"""Aktualisiert die Dojo-Termine in index.md.
+
+Regel: Jedes Dojo findet am 2. Samstag im Monat statt. Das Skript entfernt
+vergangene Termine aus der Liste und ergaenzt bei Bedarf neue Standard-Termine,
+sodass immer NUM_UPCOMING zukuenftige Termine gelistet sind. Bestehende (ggf.
+manuell angepasste) Zeilen werden nicht veraendert. Der hervorgehobene Hinweis
+oben bekommt das Datum des naechsten Termins.
+
+Idempotent: mehrfaches Ausfuehren am selben Tag aendert nichts.
+"""
+
+from __future__ import annotations
+
+import calendar
+import re
+from datetime import date, datetime, timedelta
+from pathlib import Path
+from zoneinfo import ZoneInfo
+
+INDEX_FILE = Path(__file__).resolve().parent.parent / "index.md"
+NUM_UPCOMING = 3
+TIMEZONE = ZoneInfo("Europe/Berlin")
+
+LIST_HEADING = "### Unsere nächsten Dojos"
+DATE_RE = re.compile(r"(\d{2})\.(\d{2})\.(\d{4})")
+# Zeile eines Listeneintrags, z.B. "* **11.07.2026**, 14-17 Uhr, ..."
+ENTRY_RE = re.compile(r"^\s*\*\s*\*\*(\d{2}\.\d{2}\.\d{4})\*\*")
+
+
+def parse_de_date(text: str) -> date:
+    """Parst ein Datum im Format TT.MM.JJJJ."""
+    day, month, year = (int(part) for part in text.split("."))
+    return date(year, month, day)
+
+
+def format_de_date(value: date) -> str:
+    return value.strftime("%d.%m.%Y")
+
+
+def second_saturday(year: int, month: int) -> date:
+    """Liefert den 2. Samstag des Monats."""
+    weeks = calendar.monthcalendar(year, month)
+    saturdays = [week[calendar.SATURDAY] for week in weeks if week[calendar.SATURDAY] != 0]
+    return date(year, month, saturdays[1])
+
+
+def next_second_saturday_after(after: date) -> date:
+    """Erster 2.-Samstag-Termin, der echt nach `after` liegt."""
+    year, month = after.year, after.month
+    while True:
+        candidate = second_saturday(year, month)
+        if candidate > after:
+            return candidate
+        month += 1
+        if month > 12:
+            month = 1
+            year += 1
+
+
+def standard_entry_line(value: date) -> str:
+    return (
+        f"* **{format_de_date(value)}**, 14-17 Uhr, "
+        "Haus H, Raum E.51/52: offenes Dojo"
+    )
+
+
+def update_content(content: str, today: date) -> str:
+    lines = content.splitlines()
+
+    # Listenblock unter der Ueberschrift finden.
+    try:
+        heading_idx = next(i for i, line in enumerate(lines) if line.strip() == LIST_HEADING)
+    except StopIteration:
+        raise SystemExit(f"Ueberschrift '{LIST_HEADING}' nicht in index.md gefunden.")
+
+    start = heading_idx + 1
+    while start < len(lines) and lines[start].strip() == "":
+        start += 1
+
+    end = start
+    entries: list[tuple[date, str]] = []
+    while end < len(lines) and ENTRY_RE.match(lines[end]):
+        match = ENTRY_RE.match(lines[end])
+        entries.append((parse_de_date(match.group(1)), lines[end]))
+        end += 1
+
+    if not entries:
+        raise SystemExit("Keine Dojo-Termine im Listenblock gefunden.")
+
+    # Vergangene Termine entfernen, Rest sortieren.
+    future = sorted((d, line) for d, line in entries if d >= today)
+
+    # Auf NUM_UPCOMING auffuellen.
+    while len(future) < NUM_UPCOMING:
+        seed = future[-1][0] if future else today - timedelta(days=1)
+        new_date = next_second_saturday_after(seed)
+        future.append((new_date, standard_entry_line(new_date)))
+
+    future = future[:NUM_UPCOMING]
+    new_list_lines = [line for _, line in future]
+    lines[start:end] = new_list_lines
+
+    content = "\n".join(lines)
+    if content.endswith("\n") is False and content:
+        content += "\n"
+
+    # Hinweiszeile ("Nächstes Dojo: ... am TT.MM.JJJJ ...") auf naechsten Termin setzen.
+    next_date_str = format_de_date(future[0][0])
+    content = re.sub(
+        r"(Nächstes Dojo:.*?am )\d{2}\.\d{2}\.\d{4}",
+        lambda m: m.group(1) + next_date_str,
+        content,
+        count=1,
+    )
+    return content
+
+
+def main() -> None:
+    today = datetime.now(TIMEZONE).date()
+    original = INDEX_FILE.read_text(encoding="utf-8")
+    updated = update_content(original, today)
+    if updated != original:
+        INDEX_FILE.write_text(updated, encoding="utf-8")
+        print("index.md aktualisiert.")
+    else:
+        print("Keine Aenderung noetig.")
+
+
+if __name__ == "__main__":
+    main()