For your convenience in entering dates, AnyPO has a feature called a Pocket Calendar.  The Pocket Calendar is activated by clicking the small "C" (Calendar) button beside a date field.  The current month will appear and the current date will be circled.

To select a date click on the appropriate day with the mouse.  The blue indicator will move to the selected day.  Click on OK and the selected date will be automatically inserted.  (You can also double-click in lieu of clicking on OK.)

You can move forward or backwards through the months by clicking on the right and left arrows at the top of the calendar.  You may also move to a different month by clicking on the name of the month.  For example, if you click on the word "January," a list of months will appear from which you can select.

Lastly, you can move to different years by clicking on the year.  If, for instance, you click on the number "2006," a list of years will appear from which you can select (shown below):