Klára Dán von Neumann died in San Diego, California, United States. Her death marked the end of a remarkable life and career in mathematics and computer science.

The first electronic stored-program computer, the Small-Scale Experimental Machine (SSEM), nicknamed 'Baby', ran its first program at the University of Manchester. This event highlights the early days of stored-program computers, the type of technology Klára Dán von Neumann was working on.

Klára Dán left Europe by boat to the United States. This event signifies her escape from the looming dangers of World War II and the beginning of her life in America, where she would make significant contributions to computer science.

Klára Dán von Neumann was born in Budapest, Kingdom of Hungary, to Károly Dán and Kamilla Stadler. This marks the beginning of the life of a pioneering figure in computer science and early programming.