What time-span does Harry Potter and the Stone comprise?

While the exact time span isn't explicitly stated, Harry Potter and the Sorcerer's Stone (the American title) spans roughly a year, from late summer/early autumn to the following summer. Here's a breakdown:

* Early August: Harry's birthday and the arrival of Hagrid.

* Late August/Early September: Harry attends Hogwarts for the first time.

* The entire school year: Harry attends classes, learns about magic, and discovers the truth about Voldemort.

* Late June/Early July: The final battle with Voldemort and the end of the school year.

Therefore, the story encompasses approximately one academic year, with a few days before and after.