You can view a calendar with all the 2009 dates relating to options at; <a href="http://www.optionsclearing.com/publications/xcal/xcal.jsp" rel="nofollow" target="_blank">http://www.optionsclearing.com/publications/xcal/xcal.jsp</a> If you note on the legend, expiring options cease trading at 12:00 pm (ie midnight)