Simplify the following text for a Grade 4 native English-speaking person.
Original: The diary , which was given to Anne on her 13th birthday , chronicles her life from 12 June 1942 until 1 August 1944 .
Simplified: The diary had been given to Anne on her 13th birthday . It tells of her life from 12 June 1942 until 1 August 1944 .