I know where and when I was when I first heard the song...
I know of no other song that I can say that about.
At the time it struck me, now it is just a song, what does that mean? Hell if I know.
Same here.
I guess it was around 1971. I was home for the weekend from college. I had just stopped by a store and gotten a soft drink.
It was raining lightly, the parking lot was wet. I got in the car and had just turned on the radio. The song started just about the same time.
Very odd in that like I said, I knew it was something special immediately.