Noonday Demon
The term Noonday Demon (also known to be referred to as Noonday Devil, Demon of Noontide, Midday Demon or Meridian Demon) is used as a synonym and a personification of acedia, which stems from the Greek word ἀκηδία, meaning 'to lack care'. It indicates a demonic figure thought to be active at the noon hour which inclines its victims (most often monastics) to restlessness, excitability, and inattention to duty.