You had recently moved on into a new apartment. But really caught your interest was the vintage telephone that was always calling you.

It was a prank you had thought, yet you payed no heed to it. The conversations between the stranger in the other line and yours are always exciting even though it was something that had happened 50 years ago.

"What's the date for you?" asked the man. "July 28, 2020" you answered. After a moment of silence the man replied.

"It's July 28, 1970 here..."