* Note: The two sets of numbers don't always add up because children who take longer naps tend to sleep fewer hours at night and vice versa. (babycenter.com)
Some hostels still have this policy dictating closing the establishment for few hours at night. (hostels-amsterdam.nl)
Some babies may scream for a few hours at night, while others might cry inconsolably all day and all night. (verywellfamily.com)