MarkThisDate has a list of several calendars with all kinds of events. For example the complete list of stages for the Tour de France, Formula 1 race dates and the birthdays of the royal family. Each calendar can be imported into Google Calendar, Outlook, Vista, iCal, Netvibes, Lotus Notes and exported to PDF and Excel. Importing a particular calendar into for example Google Calendar is easy. And when it is imported we can easily turn it on or off to show the entries of the calendar.