title: Set the time-of-day on a ZonedDateTime in java.time?
body: <p>How can I alter the time-of-day portion of an existing <a href="http://docs.oracle.com/javase/8/docs/api/java/time/ZonedDateTime.html" rel="noreferrer"><code>ZonedDateTime</code></a> object? I want to keep the date and time zone but alter the hour and minutes.</p>