title: Change time zone (UTC) of Firebase
body: <p>I have a webApp and not a app, when I send a function to Cloud Functions for Firebase <code>new Data()</code> don't get the my local time, used <code>.toLocaleString('pt-BR', { timeZone: 'America/Sao_Paulo' })</code> and other ways of internet but no success.</p>
  
  <p>I can't change timezone of my app in settings Firebase, because it's just a WebApp and not an app.</p>