title: How do I extract the Year from an Excel serial date number
body: <p>If I want to convert an Excel serial date to a datetime using PowerShell I can do</p>
  <p><code>$date = 43557</code></p>
  <p><code>[DateTime]::FromOADate($date)</code></p>
  <p>and the get the entire datetime, but how can I extract only the <strong>year</strong> from the serial date and pass it to a variable?</p>