Year View Scroll Bar

  The vertical scroll bar moves the displayed year through the
  current decade.

  If you try to scroll up when the slider is at the top of the
  scroll bar, the last year of the previous decade is displayed
  (the slider jumps to the bottom of the scroll bar).

  Conversely, if you try to scroll down when the slider is at the
  bottom of the scroll bar, the first year of the next decade is
  displayed (the slider jumps to the top of the scroll bar).

  Additional topics:

  *   Month View