• Access key + w focuses the widget

Closed popup:

• enter triggers change event
• esc closes the popup
• alt down arrow opens the popup
• alt up arrow closes the popup

Opened popup (date view):

• left arrow highlights previous day
• right arrow highlights next day
• up arrow highlights same day from the previous week
• down arrow highlights same day from the next week
• ctrl left arrow navigates to previous month
• ctrl right arrow navigates to next month
• ctrl up arrow navigates to previous view
• ctrl down arrow navigates to next view
• home highlights first day of the month
• end highlights last day of the month
• enter if in "month" view selects the highlighted day. In other views navigates to a lower view