database/migrations/2014_10_12_000000_create_users_table.php

@@ -20,7 +20,7 @@ return new class extends Migration
             $table->string('password');
             $table->rememberToken();
             $table->unsignedInteger('lang')->nullable();
-            $table->unsignedInteger('timezone')->nullable();
+            $table->string('timezone', 50)->nullable();
             $table->timestamps();
             $table->softDeletes();
         });