This website displays a list of upcoming tax due dates. In the menu at the top of the page, there is a link to My Preferences which will allow you to select only the information you want to see.
If you prefer to use a calendar lookalike, there is an "Add tax events to a calendar program" link on the Tools page which will enable you to subscribe to the tax filing due dates and view them in a calendar program of your choice such as Microsoft Office, Mac OS X Calendar, Google Calendar, or a calendar app on a smartphone.
Continue to the reminder list or click My Preferences above.