UTC−05:00 is a UTC offset of 5 hours earlier than Coordinated Universal Time. It is observed as Central Daylight Time in the United States and Canada from the second Sunday in March to the first Sunday in November (see Daylight saving time); otherwise, as Eastern Standard Time.

In Central America, this time offset is observed year round in the Western Caribbean Time Zone.

The clock time in this zone is based on the mean solar time of the 75th meridian west of the Greenwich Observatory.

Alfred Bernhard Nobel ( pronunciation (help·info)) (21 October 1833 – 10 December 1896) was a Swedish chemist, engineer, innovator, and armaments manufacturer. He was the inventor of dynamite. Nobel also owned Bofors, which he had redirected from its previous role as primarily an iron and steel producer to a major manufacturer of cannon and other armaments. Nobel held 350 different patents, dynamite being the most famous. He used his fortune to posthumously institute the Nobel Prizes. The synthetic element nobelium was named after him. His name also survives in modern-day companies such as Dynamit Nobel and Akzo Nobel, which are descendents of the companies Nobel himself established.

Born in Stockholm, Alfred Nobel was the fourth son of Immanuel Nobel (1801–1872), an inventor and engineer, and Andriette Ahlsell Nobel (1805–1889). The couple married in 1827 and had eight children, although, beset by poverty, only Alfred and his three brothers survived past childhood. Through his father, Alfred Nobel was a descendant of the Swedish scientist Olaus Rudbeck (1630-1702), and the boy, in his turn, was interested in engineering, and especially explosives, from a young age, learning the basic principles from his father.