text: what day of the week is april 20, 2009?   yup, monday. for future reference, if you are using windows, you can double click on your clock and it will open a window with a calendar in it. if you change the month and year to that of the date you are looking for, it will pull up a calendar and you can check which dates fall on what days. when you exit the window, just make sure to hit cancel so you don't alter your computer's clock and time.