title: PHP DateTime format Year bug
body: <p>this is the first time i encountered this bug, i usually use the same syntax to format dates. but now, i don't know what happened to <code>DateTime</code> format.</p>
  
  <p>I've tried searching some resources, including Carbon and php DateTime formatting. but no luck.</p>
  
  <p>PS: i am using laravel and it automatically extends timestamps into <code>Carbon</code> instance.</p>
  
  <p><a href="https://i.stack.imgur.com/oovxh.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/oovxh.png" alt="enter image description here"></a></p>