I have the same cutting. It was Sunday, December 13 1959, the day after Bruce McLaren won the United States Grand Prix at Sebring. Not really the day after, due to the time difference, only about 7 or 8 hours later.
Brother and I were there - there was also an Auckland Car Club meeting at Ardmore the previous day, but the family car wasn't always available for motor race jaunts, so I missed that one.
Stu Buchanan