This is not the question that has been answered a million times already all over the internet. This situation is much tougher to negotiate due to the baggage and special set of circumstances in which those of us with a Borderline Personality Disorder/Narcissistic Personality Disorder (or similary afflicted) parent find ourselves.
Maybe we don't have heaps of pictures from happy family outings we can turn into a nice book. Maybe mom doesn't like anybody or anything and prefers to sit in the dark all the time. Maybe dad doesn't like to read or be read to. Maybe all their hobbies are long gone. Maybe mom/dad have a history of attention getting stunts, especially on special days.
What are things you've done in the past to mark a special day with this kind of person?