diff --git a/apps/api/src/routers/project.ts b/apps/api/src/routers/project.ts
index b2489b5..8daf82f 100644
--- a/apps/api/src/routers/project.ts
+++ b/apps/api/src/routers/project.ts
@@ -74,7 +74,6 @@ export const projectRouter = router({
             logoUrl: input.logoUrl ?? null,
             kind: input.kind,
             verantwortlicheUserId: input.verantwortlicheUserId ?? null,
-            arbeitsmodus: input.arbeitsmodus ?? null,
             outlineSteckbriefUrl: input.outlineSteckbriefUrl,
             planeProjectUrl: input.planeProjectUrl,
             risikolisteUrl: input.risikolisteUrl ?? null,
diff --git a/apps/web/src/routes/bereich.tsx b/apps/web/src/routes/bereich.tsx
index 878c3c0..bb0ef52 100644
--- a/apps/web/src/routes/bereich.tsx
+++ b/apps/web/src/routes/bereich.tsx
@@ -192,7 +192,6 @@ function ProjectCreateDialog({
     }
   }, [areas, areaId, defaultSlug]);
   const [kind, setKind] = useState<'kundenprojekt' | 'internes_projekt'>('internes_projekt');
-  const [arbeitsmodus, setArbeitsmodus] = useState<'cycle' | 'kanban'>('kanban');
   const [steckbrief, setSteckbrief] = useState('');
   const [plane, setPlane] = useState('');
 
@@ -215,7 +214,6 @@ function ProjectCreateDialog({
       description: description.trim() || undefined,
       logoUrl: logoUrl ?? undefined,
       kind,
-      arbeitsmodus,
       outlineSteckbriefUrl: steckbrief,
       planeProjectUrl: plane,
       milestones: [],
@@ -280,16 +278,6 @@ function ProjectCreateDialog({
               <option value="internes_projekt">Internes Projekt</option>
             </select>
           </Field>
-          <Field label="Arbeitsmodus">
-            <select
-              value={arbeitsmodus}
-              onChange={(e) => setArbeitsmodus(e.target.value as 'cycle' | 'kanban')}
-              className="w-full rounded-[var(--radius-md)] border border-[var(--color-border)] bg-white px-3 py-2 text-sm"
-            >
-              <option value="kanban">Kanban</option>
-              <option value="cycle">Cycle</option>
-            </select>
-          </Field>
           <Field label="Outline-Steckbrief-URL">
             <input
               required
diff --git a/apps/web/src/routes/projekt.tsx b/apps/web/src/routes/projekt.tsx
index 8f78f8e..5d4b23f 100644
--- a/apps/web/src/routes/projekt.tsx
+++ b/apps/web/src/routes/projekt.tsx
@@ -123,10 +123,11 @@ export function ProjektRoute() {
             <span className="rounded-full bg-black/5 px-2.5 py-1 text-xs">archiviert</span>
           )}
         </div>
-        <p className="text-[var(--color-ink-muted)]">
-          {p.kind === 'kundenprojekt' ? 'Kundenprojekt' : 'Internes Projekt'} ·{' '}
-          {p.arbeitsmodus ?? '—'} · {p.deadline ? `Deadline ${p.deadline}` : 'kein Deadline'}
-        </p>
+        <div className="flex flex-wrap items-center gap-2 text-[var(--color-ink-muted)]">
+          <span>{p.kind === 'kundenprojekt' ? 'Kundenprojekt' : 'Internes Projekt'}</span>
+          <span>·</span>
+          <DeadlineControl projectId={p.id} deadline={p.deadline} />
+        </div>
         <div className="mt-3">
           <ModusControl projectId={p.id} modus={p.modus as ProjectModus} />
         </div>
@@ -243,6 +244,63 @@ function ModusControl({ projectId, modus }: { projectId: string; modus: ProjectM
 }
 
 // --- Ziel & Maxime + SMART-Ziel, Nicht-Ziele, Liefergegenstände, Zieldreieck -
+function DeadlineControl({ projectId, deadline }: { projectId: string; deadline: string | null }) {
+  const utils = trpc.useUtils();
+  const [editing, setEditing] = useState(false);
+  const [draft, setDraft] = useState(deadline ?? '');
+  const update = trpc.project.update.useMutation({
+    onSuccess: async () => {
+      toast(voice.toast.saved);
+      await utils.project.byId.invalidate({ id: projectId });
+      setEditing(false);
+    },
+  });
+
+  if (editing) {
+    const warnings = dateWarnings(draft || undefined);
+    return (
+      <span className="inline-flex flex-wrap items-center gap-2">
+        <input
+          type="date"
+          value={draft}
+          onChange={(e) => setDraft(e.target.value)}
+          className="rounded-[var(--radius-md)] border border-[var(--color-border)] bg-white px-2 py-1 text-sm text-[var(--color-ink)]"
+        />
+        <Button
+          type="button"
+          size="sm"
+          disabled={update.isPending}
+          onClick={() => update.mutate({ projectId, deadline: draft || null })}
+        >
+          Speichern
+        </Button>
+        <Button type="button" variant="ghost" size="sm" onClick={() => setEditing(false)}>
+          Abbrechen
+        </Button>
+        {warnings.length > 0 && (
+          <span className="flex items-center gap-1 text-xs text-[var(--color-ampel-amber-fg)]">
+            <AlertTriangle size={12} /> {warnings[0]}
+          </span>
+        )}
+      </span>
+    );
+  }
+  return (
+    <button
+      type="button"
+      onClick={() => {
+        setDraft(deadline ?? '');
+        setEditing(true);
+      }}
+      className="inline-flex items-center gap-1 hover:text-[var(--color-ink)] hover:underline"
+      title="Deadline bearbeiten"
+    >
+      {deadline ? `Deadline ${deadline}` : 'kein Deadline'}
+      <Pencil size={12} />
+    </button>
+  );
+}
+
 function HeaderLogo({
   projectId,
   logoUrl,
diff --git a/packages/shared/src/schemas/project.ts b/packages/shared/src/schemas/project.ts
index f110783..b995441 100644
--- a/packages/shared/src/schemas/project.ts
+++ b/packages/shared/src/schemas/project.ts
@@ -18,7 +18,6 @@ export const createProjectInput = z.object({
   logoUrl: logoUrlSchema.optional(),
   kind: z.enum(['kundenprojekt', 'internes_projekt']),
   verantwortlicheUserId: z.string().uuid().optional(),
-  arbeitsmodus: z.enum(['cycle', 'kanban']).optional(),
   outlineSteckbriefUrl: z.string().url(),
   planeProjectUrl: z.string().url(),
   risikolisteUrl: z.string().url().optional(),
@@ -114,6 +113,16 @@ export const updateProjectInput = z.object({
   liefergegenstaende: z.string().max(2000).nullable().optional(),
   zieldreieckFlex: zieldreieckFlexSchema.nullable().optional(),
   logoUrl: logoUrlSchema.nullable().optional(),
+  start: z
+    .string()
+    .regex(/^\d{4}-\d{2}-\d{2}$/)
+    .nullable()
+    .optional(),
+  deadline: z
+    .string()
+    .regex(/^\d{4}-\d{2}-\d{2}$/)
+    .nullable()
+    .optional(),
   outlineSteckbriefUrl: z.string().url().nullable().optional(),
   planeProjectUrl: z.string().url().nullable().optional(),
   risikolisteUrl: z.string().url().nullable().optional(),