title: Mapping Date to Instant adds a week
body: <p>I have the following object of type <code>java.util.Date</code> (Java 8):</p>
  
  <p><a href="https://i.stack.imgur.com/CNnYn.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/CNnYn.png" alt="enter image description here"></a></p>
  
  <p>So basically 1 January 1235 in CET format.  But the moment I cast this with Instant:</p>
  
  <p><a href="https://i.stack.imgur.com/7oqKq.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/7oqKq.png" alt="enter image description here"></a></p>
  
  <p>IntelliJ show me that a whole week has been added! Instant uses UTC format, which explains why one hour is subtracted (one hour difference between CET and UTC). But where does the week come from?</p>