diff --git a/api/advent22_api/core/depends.py b/api/advent22_api/core/depends.py
index 29bfbc5..b8482a6 100644
--- a/api/advent22_api/core/depends.py
+++ b/api/advent22_api/core/depends.py
@@ -1,3 +1,4 @@
+from datetime import date
 from io import BytesIO
 from typing import cast
 
@@ -7,7 +8,7 @@ from PIL import Image, ImageFont
 from .advent_image import _XY, AdventImage
 from .calendar_config import CalendarConfig, get_calendar_config
 from .config import Config, get_config
-from .helpers import Random, list_images_auto, load_image, set_len
+from .helpers import EventDays, Random, list_images_auto, load_image, set_len
 from .webdav import WebDAV
 
 
@@ -21,6 +22,22 @@ async def get_all_days(
     return sorted(set(door.day for door in cal_cfg.doors))
 
 
+async def get_all_event_days(
+    days: list[int] = Depends(get_all_days),
+) -> EventDays:
+    """
+    Aktuelles EventDays Objekt
+    """
+
+    return EventDays.get(
+        today=date.today(),
+        begin_month=12,
+        begin_day=1,
+        events_after=[day - 1 for day in days],
+        closing_after=90,
+    )
+
+
 async def get_all_parts(
     cfg: Config = Depends(get_config),
     days: list[int] = Depends(get_all_days),
diff --git a/api/advent22_api/routers/admin.py b/api/advent22_api/routers/admin.py
index 5601c91..e3eeb79 100644
--- a/api/advent22_api/routers/admin.py
+++ b/api/advent22_api/routers/admin.py
@@ -3,9 +3,11 @@ from datetime import date
 from fastapi import APIRouter, Depends
 from pydantic import BaseModel
 
+from advent22_api.core.helpers import EventDays
+
 from ..core.calendar_config import CalendarConfig, DoorsSaved, get_calendar_config
 from ..core.config import Config, get_config
-from ..core.depends import get_all_image_names, get_all_parts
+from ..core.depends import get_all_event_days, get_all_image_names, get_all_parts
 from ..core.settings import SETTINGS
 from ._security import require_admin, user_is_admin
 
@@ -22,9 +24,9 @@ async def is_admin(
 class ConfigModel(BaseModel):
     class __Puzzle(BaseModel):
         solution: str
-        begin: date
+        first: date
+        last: date
         end: date
-        closing: date
         seed: str
 
     class __Calendar(BaseModel):
@@ -56,6 +58,7 @@ async def get_config_model(
     _: None = Depends(require_admin),
     cfg: Config = Depends(get_config),
     cal_cfg: CalendarConfig = Depends(get_calendar_config),
+    event_days: EventDays = Depends(get_all_event_days),
 ) -> ConfigModel:
     """
     Kombiniert aus privaten `settings`, `config` und `calendar_config`
@@ -65,9 +68,9 @@ async def get_config_model(
         {
             "puzzle": {
                 "solution": cfg.puzzle.solution,
-                "begin": date.today(),  # TODO
-                "end": date.today(),  # TODO
-                "closing": date.today(),  # TODO
+                "first": event_days.first,
+                "last": event_days.last,
+                "end": event_days.end,
                 "seed": cfg.puzzle.random_seed,
             },
             "calendar": {
diff --git a/ui/src/components/admin/ConfigView.vue b/ui/src/components/admin/ConfigView.vue
index 9b2b5fa..591932e 100644
--- a/ui/src/components/admin/ConfigView.vue
+++ b/ui/src/components/admin/ConfigView.vue
@@ -21,13 +21,13 @@
               <dd>dd-hh-mm-ss</dd>
 
               <dt>Erstes Türchen</dt>
-              <dd>{{ config_model.puzzle.begin }}</dd>
+              <dd>{{ config_model.puzzle.first }}</dd>
 
               <dt>Letztes Türchen</dt>
-              <dd>{{ config_model.puzzle.end }}</dd>
+              <dd>{{ config_model.puzzle.last }}</dd>
 
-              <dt>Rätsel schließt</dt>
-              <dd>{{ config_model.puzzle.closing }}</dd>
+              <dt>Rätsel schließt nach</dt>
+              <dd>{{ config_model.puzzle.end }}</dd>
 
               <dt>Zufalls-Seed</dt>
               <dd class="is-family-monospace">
@@ -142,9 +142,9 @@ export default class extends Vue {
   public config_model: ConfigModel = {
     puzzle: {
       solution: "ABCDEFGHIJKLMNOPQRSTUVWX",
-      begin: "01.12.2023",
-      end: "24.12.2023",
-      closing: "01.04.2024",
+      first: "01.12.2023",
+      last: "24.12.2023",
+      end: "01.04.2024",
       seed: "",
     },
     calendar: {
diff --git a/ui/src/lib/api.ts b/ui/src/lib/api.ts
index 2ce8b46..d0feb70 100644
--- a/ui/src/lib/api.ts
+++ b/ui/src/lib/api.ts
@@ -1,9 +1,9 @@
 export interface ConfigModel {
   puzzle: {
     solution: string;
-    begin: string;
+    first: string;
+    last: string;
     end: string;
-    closing: string;
     seed: string;
   };
   calendar: {