diff --git a/ApiCore-Frontend/src/app/(app)/queens/[id]/queen-edit-card.tsx b/ApiCore-Frontend/src/app/(app)/queens/[id]/queen-edit-card.tsx
index 15a98fa..5d284fe 100644
--- a/ApiCore-Frontend/src/app/(app)/queens/[id]/queen-edit-card.tsx
+++ b/ApiCore-Frontend/src/app/(app)/queens/[id]/queen-edit-card.tsx
@@ -4,6 +4,7 @@ import { FormEvent, useState } from "react";
 import { Crown } from "lucide-react";
 import { useMutation, useQuery, useQueryClient } from "@tanstack/react-query";
 import { fetchQueens, updateQueen } from "@/lib/queens/api";
+import { suggestMarkingColorForYear } from "@/lib/queens/marking-color";
 import { Queen, QueenStatus } from "@/lib/queens/types";
 import { QUEEN_STATUSES, QUEEN_STATUS_LABELS } from "@/lib/queens/labels";
 import { statusTone } from "@/lib/status-tone";
@@ -28,12 +29,23 @@ import {
 
 export function QueenEditCard({ queen }: { queen: Queen }) {
   const queryClient = useQueryClient();
+  const [hatchYear, setHatchYear] = useState(queen.hatchYear?.toString() ?? "");
   const [breed, setBreed] = useState(queen.breed ?? "");
   const [origin, setOrigin] = useState(queen.origin ?? "");
+  const [markingColor, setMarkingColor] = useState(queen.markingColor ?? "");
+  const [markingNumber, setMarkingNumber] = useState(queen.markingNumber ?? "");
   const [motherQueenId, setMotherQueenId] = useState(queen.motherQueenId ?? "");
   const [notes, setNotes] = useState(queen.notes ?? "");
   const [status, setStatus] = useState<QueenStatus>(queen.status);
 
+  function handleHatchYearChange(value: string) {
+    setHatchYear(value);
+    const year = Number(value);
+    if (!markingColor && value && Number.isInteger(year)) {
+      setMarkingColor(suggestMarkingColorForYear(year));
+    }
+  }
+
   const { data: queens } = useQuery({
     queryKey: ["queens"],
     queryFn: () => fetchQueens(),
@@ -43,8 +55,11 @@ export function QueenEditCard({ queen }: { queen: Queen }) {
   const mutation = useMutation({
     mutationFn: () =>
       updateQueen(queen.id, {
+        hatchYear: hatchYear ? Number(hatchYear) : undefined,
         breed: breed || undefined,
         origin: origin || undefined,
+        markingColor: markingColor || undefined,
+        markingNumber: markingNumber || undefined,
         motherQueenId: motherQueenId || undefined,
         notes: notes || undefined,
         status,
@@ -76,6 +91,16 @@ export function QueenEditCard({ queen }: { queen: Queen }) {
       </CardHeader>
       <CardContent>
         <form className="flex flex-col gap-4" onSubmit={handleSubmit}>
+          <div className="flex flex-col gap-2">
+            <Label htmlFor="queen-hatch-year">Schlupfjahr</Label>
+            <Input
+              id="queen-hatch-year"
+              type="number"
+              inputMode="numeric"
+              value={hatchYear}
+              onChange={(event) => handleHatchYearChange(event.target.value)}
+            />
+          </div>
           <div className="flex flex-col gap-2">
             <Label htmlFor="queen-breed">Zucht/Rasse</Label>
             <Input
@@ -92,6 +117,22 @@ export function QueenEditCard({ queen }: { queen: Queen }) {
               onChange={(event) => setOrigin(event.target.value)}
             />
           </div>
+          <div className="flex flex-col gap-2">
+            <Label htmlFor="queen-marking-color">Zeichenfarbe</Label>
+            <Input
+              id="queen-marking-color"
+              value={markingColor}
+              onChange={(event) => setMarkingColor(event.target.value)}
+            />
+          </div>
+          <div className="flex flex-col gap-2">
+            <Label htmlFor="queen-marking-number">Zeichennummer</Label>
+            <Input
+              id="queen-marking-number"
+              value={markingNumber}
+              onChange={(event) => setMarkingNumber(event.target.value)}
+            />
+          </div>
           <div className="flex flex-col gap-2">
             <Label htmlFor="queen-mother">Mutter</Label>
             <Select
diff --git a/ApiCore-Frontend/src/app/(app)/queens/new/page.tsx b/ApiCore-Frontend/src/app/(app)/queens/new/page.tsx
index 4ab0b33..c27a51f 100644
--- a/ApiCore-Frontend/src/app/(app)/queens/new/page.tsx
+++ b/ApiCore-Frontend/src/app/(app)/queens/new/page.tsx
@@ -5,6 +5,7 @@ import { useRouter } from "next/navigation";
 import { useMutation, useQuery, useQueryClient } from "@tanstack/react-query";
 import { Crown } from "lucide-react";
 import { createQueen, fetchQueens } from "@/lib/queens/api";
+import { suggestMarkingColorForYear } from "@/lib/queens/marking-color";
 import { Button } from "@/components/ui/button";
 import { Input } from "@/components/ui/input";
 import { Label } from "@/components/ui/label";
@@ -22,11 +23,22 @@ export default function NewQueenPage() {
   const router = useRouter();
   const queryClient = useQueryClient();
   const [code, setCode] = useState("");
+  const [hatchYear, setHatchYear] = useState("");
   const [breed, setBreed] = useState("");
   const [origin, setOrigin] = useState("");
+  const [markingColor, setMarkingColor] = useState("");
+  const [markingNumber, setMarkingNumber] = useState("");
   const [motherQueenId, setMotherQueenId] = useState("");
   const [error, setError] = useState<string | null>(null);
 
+  function handleHatchYearChange(value: string) {
+    setHatchYear(value);
+    const year = Number(value);
+    if (!markingColor && value && Number.isInteger(year)) {
+      setMarkingColor(suggestMarkingColorForYear(year));
+    }
+  }
+
   const { data: queens } = useQuery({
     queryKey: ["queens"],
     queryFn: () => fetchQueens(),
@@ -48,8 +60,11 @@ export default function NewQueenPage() {
     setError(null);
     mutation.mutate({
       code,
+      hatchYear: hatchYear ? Number(hatchYear) : undefined,
       breed: breed || undefined,
       origin: origin || undefined,
+      markingColor: markingColor || undefined,
+      markingNumber: markingNumber || undefined,
       motherQueenId: motherQueenId || undefined,
     });
   }
@@ -74,6 +89,16 @@ export default function NewQueenPage() {
                 onChange={(event) => setCode(event.target.value)}
               />
             </div>
+            <div className="flex flex-col gap-2">
+              <Label htmlFor="queen-hatch-year">Schlupfjahr</Label>
+              <Input
+                id="queen-hatch-year"
+                type="number"
+                inputMode="numeric"
+                value={hatchYear}
+                onChange={(event) => handleHatchYearChange(event.target.value)}
+              />
+            </div>
             <div className="flex flex-col gap-2">
               <Label htmlFor="queen-breed">Zucht/Rasse</Label>
               <Input
@@ -90,6 +115,26 @@ export default function NewQueenPage() {
                 onChange={(event) => setOrigin(event.target.value)}
               />
             </div>
+            <div className="flex flex-col gap-2">
+              <Label htmlFor="queen-marking-color">Zeichenfarbe</Label>
+              <Input
+                id="queen-marking-color"
+                value={markingColor}
+                onChange={(event) => setMarkingColor(event.target.value)}
+              />
+              <p className="text-xs text-muted-foreground">
+                Wird nach internationaler Konvention aus dem Schlupfjahr vorgeschlagen, kann
+                aber angepasst werden.
+              </p>
+            </div>
+            <div className="flex flex-col gap-2">
+              <Label htmlFor="queen-marking-number">Zeichennummer</Label>
+              <Input
+                id="queen-marking-number"
+                value={markingNumber}
+                onChange={(event) => setMarkingNumber(event.target.value)}
+              />
+            </div>
             <div className="flex flex-col gap-2">
               <Label htmlFor="queen-mother">Mutter</Label>
               <Select
diff --git a/ApiCore-Frontend/src/app/(app)/queens/page.tsx b/ApiCore-Frontend/src/app/(app)/queens/page.tsx
index 1af7f07..ab4fa58 100644
--- a/ApiCore-Frontend/src/app/(app)/queens/page.tsx
+++ b/ApiCore-Frontend/src/app/(app)/queens/page.tsx
@@ -113,7 +113,10 @@ export default function QueensPage() {
                   {QUEEN_STATUS_LABELS[queen.status]}
                 </Badge>
               }
-              fields={[{ label: "Schlupfjahr", value: queen.hatchYear ?? "—" }]}
+              fields={[
+                { label: "Schlupfjahr", value: queen.hatchYear ?? "—" },
+                { label: "Zeichenfarbe", value: queen.markingColor ?? "—" },
+              ]}
             />
           ))}
         </div>
diff --git a/ApiCore-Frontend/src/lib/queens/marking-color.ts b/ApiCore-Frontend/src/lib/queens/marking-color.ts
new file mode 100644
index 0000000..ab86361
--- /dev/null
+++ b/ApiCore-Frontend/src/lib/queens/marking-color.ts
@@ -0,0 +1,20 @@
+// Internationally standardized queen marking colors by the last digit of
+// the hatch year (used across European beekeeping regardless of country):
+// 1/6 white, 2/7 yellow, 3/8 red, 4/9 green, 5/0 blue.
+const MARKING_COLORS_BY_LAST_DIGIT: Record<number, string> = {
+  1: "Weiß",
+  6: "Weiß",
+  2: "Gelb",
+  7: "Gelb",
+  3: "Rot",
+  8: "Rot",
+  4: "Grün",
+  9: "Grün",
+  5: "Blau",
+  0: "Blau",
+};
+
+export function suggestMarkingColorForYear(hatchYear: number): string {
+  const lastDigit = ((hatchYear % 10) + 10) % 10;
+  return MARKING_COLORS_BY_LAST_DIGIT[lastDigit];
+}
diff --git a/ApiCore-Frontend/src/lib/queens/types.ts b/ApiCore-Frontend/src/lib/queens/types.ts
index 1b48f6c..af6c12a 100644
--- a/ApiCore-Frontend/src/lib/queens/types.ts
+++ b/ApiCore-Frontend/src/lib/queens/types.ts
@@ -32,15 +32,21 @@ export interface Queen {
 
 export interface CreateQueenInput {
   code: string;
+  hatchYear?: number;
   breed?: string;
   origin?: string;
+  markingColor?: string;
+  markingNumber?: string;
   motherQueenId?: string;
   notes?: string;
 }
 
 export interface UpdateQueenInput {
+  hatchYear?: number;
   breed?: string;
   origin?: string;
+  markingColor?: string;
+  markingNumber?: string;
   motherQueenId?: string;
   notes?: string;
   status?: QueenStatus;