A curfew is a government-imposed regulation that restricts people from being in public spaces or outside their homes during designated hours, typically at night. Curfews are often enacted during emergencies, such as civil unrest, natural disasters, or public health crises, to help maintain public order and safety. Violating a curfew can result in penalties or legal consequences. In the context of cybersecurity, curfews may also refer to restrictions on digital access or online activities during certain times to enhance security or protect vulnerable groups.