Website Calendar auto entry

When I find event dates, names and location information on websites, I have to manually enter this info in my reminder/calendar so that an alarm will go off days or hours before the event to notify me. I would like to be able to click on the event info on the website and have it automatically "auto-filled" in my event reminder system. I suggest that event information be displayed in a standard format that browser plug ins could be coded to recognize; a drop down box or other form of notice would appear on screen asking if the viewer would like to add this to their calendar/reminder program.