Set The Alarm

Susan set her alarm to six-thirty, and she woke up at six-thirty.
Susan set her alarm to six, and she woke up at six.
She then set her alarm to nineteen forty-one.
Sure enough, she woke up in 1941. People were walking around and going about their lives without a clue as to what horrors of war were right around the corner.
She tried all sorts of times in the past. She even tried a few in the future.
Susan set her alarm back to seven, and she woke up at seven.
Her stupid boss fired her for being late.