diff --git a/helpers/date.ts b/helpers/date.ts
index 8954379..27004d0 100644
--- a/helpers/date.ts
+++ b/helpers/date.ts
@@ -1,5 +1,5 @@
 import { parse, format, addDays, subDays } from 'date-fns'
-import { utcToZonedTime } from 'date-fns-tz'
+import { TZDateMini } from '@date-fns/tz'
 
 const FRONTEND_FORMAT = 'dd.MM.yyyy'
 const BACKEND_FORMAT = 'yyyy-MM-dd'
@@ -77,10 +77,9 @@ export function dateParseBackend(input: string): Date {
 }
 
 export function nowInTz(timezone = 'Europe/Berlin'): Date {
-  const now = new Date()
-  return utcToZonedTime(now, timezone)
+  return new Date((new TZDateMini(new Date(), timezone)).toISOString());
 }
 
 export function getNextDay(date: Date) {
   return addDays(date, 1)
-}
+}
\ No newline at end of file
diff --git a/package-lock.json b/package-lock.json
index edc22f1..193a23d 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -8,6 +8,7 @@
       "name": "pfadi-bussle",
       "version": "0.1.0",
       "dependencies": {
+        "@date-fns/tz": "^1.2.0",
         "@mdx-js/loader": "^3.1.0",
         "@mdx-js/react": "^3.1.0",
         "@next-auth/mongodb-adapter": "^1.1.3",
@@ -16,8 +17,7 @@
         "@vercel/analytics": "^1.5.0",
         "autoprefixer": "^10.4.21",
         "classnames": "^2.5.1",
-        "date-fns": "^2.30.0",
-        "date-fns-tz": "^2.0.1",
+        "date-fns": "^4.1.0",
         "googleapis": "^148.0.0",
         "ics": "^3.8.1",
         "mongoose": "^8.13.1",
@@ -1372,6 +1372,11 @@
       "integrity": "sha512-0hYQ8SB4Db5zvZB4axdMHGwEaQjkZzFjQiN9LVYvIFB2nSUHW9tYpxWriPrWDASIxiaXax83REcLxuSdnGPZtw==",
       "dev": true
     },
+    "node_modules/@date-fns/tz": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/@date-fns/tz/-/tz-1.2.0.tgz",
+      "integrity": "sha512-LBrd7MiJZ9McsOgxqWX7AaxrDjcFVjWH/tIKJd7pnR7McaslGYOP1QmmiBXdJH/H/yLCT+rcQ7FaPBUxRGUtrg=="
+    },
     "node_modules/@eslint-community/eslint-utils": {
       "version": "4.4.0",
       "resolved": "https://registry.npmjs.org/@eslint-community/eslint-utils/-/eslint-utils-4.4.0.tgz",
@@ -4892,26 +4897,12 @@
       }
     },
     "node_modules/date-fns": {
-      "version": "2.30.0",
-      "resolved": "https://registry.npmjs.org/date-fns/-/date-fns-2.30.0.tgz",
-      "integrity": "sha512-fnULvOpxnC5/Vg3NCiWelDsLiUc9bRwAPs/+LfTLNvetFCtCTN+yQz15C/fs4AwX1R9K5GLtLfn8QW+dWisaAw==",
-      "dependencies": {
-        "@babel/runtime": "^7.21.0"
-      },
-      "engines": {
-        "node": ">=0.11"
-      },
+      "version": "4.1.0",
+      "resolved": "https://registry.npmjs.org/date-fns/-/date-fns-4.1.0.tgz",
+      "integrity": "sha512-Ukq0owbQXxa/U3EGtsdVBkR1w7KOQ5gIBqdH2hkvknzZPYvBxb/aa6E8L7tmjFtkwZBu3UXBbjIgPo/Ez4xaNg==",
       "funding": {
-        "type": "opencollective",
-        "url": "https://opencollective.com/date-fns"
-      }
-    },
-    "node_modules/date-fns-tz": {
-      "version": "2.0.1",
-      "resolved": "https://registry.npmjs.org/date-fns-tz/-/date-fns-tz-2.0.1.tgz",
-      "integrity": "sha512-fJCG3Pwx8HUoLhkepdsP7Z5RsucUi+ZBOxyM5d0ZZ6c4SdYustq0VMmOu6Wf7bli+yS/Jwp91TOCqn9jMcVrUA==",
-      "peerDependencies": {
-        "date-fns": "2.x"
+        "type": "github",
+        "url": "https://github.com/sponsors/kossnocorp"
       }
     },
     "node_modules/debug": {
@@ -12963,6 +12954,96 @@
         "type": "github",
         "url": "https://github.com/sponsors/wooorm"
       }
+    },
+    "node_modules/@next/swc-darwin-arm64": {
+      "version": "15.3.1",
+      "resolved": "https://registry.npmjs.org/@next/swc-darwin-arm64/-/swc-darwin-arm64-15.3.1.tgz",
+      "integrity": "sha512-hjDw4f4/nla+6wysBL07z52Gs55Gttp5Bsk5/8AncQLJoisvTBP0pRIBK/B16/KqQyH+uN4Ww8KkcAqJODYH3w==",
+      "cpu": [
+        "arm64"
+      ],
+      "optional": true,
+      "os": [
+        "darwin"
+      ],
+      "engines": {
+        "node": ">= 10"
+      }
+    },
+    "node_modules/@next/swc-darwin-x64": {
+      "version": "15.3.1",
+      "resolved": "https://registry.npmjs.org/@next/swc-darwin-x64/-/swc-darwin-x64-15.3.1.tgz",
+      "integrity": "sha512-q+aw+cJ2ooVYdCEqZVk+T4Ni10jF6Fo5DfpEV51OupMaV5XL6pf3GCzrk6kSSZBsMKZtVC1Zm/xaNBFpA6bJ2g==",
+      "cpu": [
+        "x64"
+      ],
+      "optional": true,
+      "os": [
+        "darwin"
+      ],
+      "engines": {
+        "node": ">= 10"
+      }
+    },
+    "node_modules/@next/swc-linux-arm64-gnu": {
+      "version": "15.3.1",
+      "resolved": "https://registry.npmjs.org/@next/swc-linux-arm64-gnu/-/swc-linux-arm64-gnu-15.3.1.tgz",
+      "integrity": "sha512-wBQ+jGUI3N0QZyWmmvRHjXjTWFy8o+zPFLSOyAyGFI94oJi+kK/LIZFJXeykvgXUk1NLDAEFDZw/NVINhdk9FQ==",
+      "cpu": [
+        "arm64"
+      ],
+      "optional": true,
+      "os": [
+        "linux"
+      ],
+      "engines": {
+        "node": ">= 10"
+      }
+    },
+    "node_modules/@next/swc-linux-arm64-musl": {
+      "version": "15.3.1",
+      "resolved": "https://registry.npmjs.org/@next/swc-linux-arm64-musl/-/swc-linux-arm64-musl-15.3.1.tgz",
+      "integrity": "sha512-IIxXEXRti/AulO9lWRHiCpUUR8AR/ZYLPALgiIg/9ENzMzLn3l0NSxVdva7R/VDcuSEBo0eGVCe3evSIHNz0Hg==",
+      "cpu": [
+        "arm64"
+      ],
+      "optional": true,
+      "os": [
+        "linux"
+      ],
+      "engines": {
+        "node": ">= 10"
+      }
+    },
+    "node_modules/@next/swc-win32-arm64-msvc": {
+      "version": "15.3.1",
+      "resolved": "https://registry.npmjs.org/@next/swc-win32-arm64-msvc/-/swc-win32-arm64-msvc-15.3.1.tgz",
+      "integrity": "sha512-yP7FueWjphQEPpJQ2oKmshk/ppOt+0/bB8JC8svPUZNy0Pi3KbPx2Llkzv1p8CoQa+D2wknINlJpHf3vtChVBw==",
+      "cpu": [
+        "arm64"
+      ],
+      "optional": true,
+      "os": [
+        "win32"
+      ],
+      "engines": {
+        "node": ">= 10"
+      }
+    },
+    "node_modules/@next/swc-win32-x64-msvc": {
+      "version": "15.3.1",
+      "resolved": "https://registry.npmjs.org/@next/swc-win32-x64-msvc/-/swc-win32-x64-msvc-15.3.1.tgz",
+      "integrity": "sha512-3PMvF2zRJAifcRNni9uMk/gulWfWS+qVI/pagd+4yLF5bcXPZPPH2xlYRYOsUjmCJOXSTAC2PjRzbhsRzR2fDQ==",
+      "cpu": [
+        "x64"
+      ],
+      "optional": true,
+      "os": [
+        "win32"
+      ],
+      "engines": {
+        "node": ">= 10"
+      }
     }
   }
 }
diff --git a/package.json b/package.json
index a25c622..823069b 100644
--- a/package.json
+++ b/package.json
@@ -11,6 +11,7 @@
     "test": "jest"
   },
   "dependencies": {
+    "@date-fns/tz": "^1.2.0",
     "@mdx-js/loader": "^3.1.0",
     "@mdx-js/react": "^3.1.0",
     "@next-auth/mongodb-adapter": "^1.1.3",
@@ -19,8 +20,7 @@
     "@vercel/analytics": "^1.5.0",
     "autoprefixer": "^10.4.21",
     "classnames": "^2.5.1",
-    "date-fns": "^2.30.0",
-    "date-fns-tz": "^2.0.1",
+    "date-fns": "^4.1.0",
     "googleapis": "^148.0.0",
     "ics": "^3.8.1",
     "mongoose": "^8.13.1",
@@ -50,4 +50,4 @@
       "^.+\\.(ts|tsx)$": "ts-jest"
     }
   }
-}
\ No newline at end of file
+}