Noontime naps, also known as siestas, are a common practice in many cultures around the world. They involve taking a short NAP during the day, usually in the afternoon, to help restore energy and alertness. SIESTA is a Spanish word meaning 'NAP' or 'REST', and is derived from the Latin phrase hora sexta, meaning 'the sixth hour'. This term is often used to refer to the midday break taken by workers in many countries, especially in hot climates.