Simplify the following text for a Grade 12 native English-speaking person.
Original: The 1960 Winter Olympics , officially known as the VIII Olympic Winter Games , were a winter multi-sport event that was held between February 18 and February 28 , 1960 in Squaw Valley , California , United States ( located near the Lake Tahoe basin ) .
Simplified: The 1960 Winter Olympics , officially known as the VIII Olympic Winter Games , were celebrated in 1960 in Squaw Valley , California , United States ( located in the Lake Tahoe basin ) .