title: uppercase first letter of month fullcalendar
body: <p>Can anyone help me uppercase the first letter of the month in fullcalendar? When I write the fullcalendar, I found that the in English, for example August, the display of month in title is correctly "August" or "Aug.". But in Spanish the first letter of the month is not capitalized. For example, "Agosto" and "Ago." is "agosto" and "ago.". </p>
  
  <p>Is there any way to correct this using css or the only way is to change the <code>locale_all.js</code> file?</p>
  
  <p><a href="https://i.stack.imgur.com/Oagnl.png" rel="noreferrer"><img src="https://i.stack.imgur.com/Oagnl.png" alt="situation for the moment AgendaWeek view"></a>
  <a href="https://i.stack.imgur.com/ps65B.png" rel="noreferrer"><img src="https://i.stack.imgur.com/ps65B.png" alt="situation for the moment month view"></a></p>