수정

src/App.js

 import React, { useState } from 'react';
 
 var  cityList = [
-  {cityName : "Andorra", timezone : "Europe/Andorra"},
+  {cityName : "Andorra", timeZone : "Europe/Andorra"},
   {cityName : "Dubai", timeZone : "Asia/Dubai"},
   {cityName : "Kabul", timeZone : "Asia/Kabul"}
 ];