In Scala, is it possible to use implicits to automatically override toString?

In Java, I would do something like

class MyDate extends java.util.Date {
  public String toString() { ... }
}

MyDate date = new MyDate

A little bit clunky. In Scala, is it possible to override toString whilst still using regular java.util.Date instead of MyDate. I have an inkling implicits are involved but would be happy to use any technique