 <p>
          The below date picker demonstrates an implementation of the <a href="../combobox-pattern.html">Combobox Pattern</a> that opens a dialog.
          The date picker dialog is opened by activating the choose date button or by moving keyboard focus to the combobox and pressing <kbd>Down Arrow</kbd> or <kbd>Alt</kbd> + <kbd>Down Arrow</kbd>.
          The dialog contains an implementation of the <a href="../../grid/grid-pattern.html">grid pattern</a> for displaying a calendar and enabling selectio