Dubai resident Cyntha Gonzalez returned a library book to the Academy of the Sacred Heart in Bloomfield Hills, Michigan, 33 years after she graduated, The Huffington Post reported.
Ms Gonzalez borrowed the book from the library and forgot to return it, until three decades later.
"I graduated from Ash in 1980. I now live in Dubai, in the UAE. In a radical decluttering of my belongings, I came across the enclosed. Please accept my sincere apologies for the 33-year tardy return," she said in her note to the school.