diff --git a/lib/auth.ts b/lib/auth.ts
index 12c17e5..f8eea01 100644
--- a/lib/auth.ts
+++ b/lib/auth.ts
@@ -92,6 +92,10 @@ export const auth = betterAuth({
         type: "boolean",
         defaultValue: false,
       },
+      timezone: {
+        type: "string",
+        defaultValue: process.env.DEFAULT_TIMEZONE || "UTC",
+      },
     },
   },
 });