Final answer:
Whataburger achieved its first $1 million sales day in 1976, demonstrating the fast-food chain's success. In contrast, Gabriel García Márquez began writing 'One Hundred Years of Solitude' in 1965, a pivotal book in the genre of magical realism.
Step-by-step explanation:
Whataburger recorded its first $1 million day in the year 1976. It's a significant milestone for businesses, especially in the food industry, to hit such a sales figure in a single day. This accomplishment reflects on the growing popularity and expansion of Whataburger during that time.
Meanwhile, the famous author Gabriel García Márquez started writing his renowned novel, One Hundred Years of Solitude, in the year 1965. This masterpiece of literature would later become one of the most significant works in the magical realism genre, marking a key point in literary history.