1 (Also called) civil year the period of time, the calendar year, containing 365 days or in a leap year 366 days. It is based on the Gregorian calendar, being divided into 12 calendar months, and is reckoned from January 1 to December 31.
40 FACTS ABOUT SLEEP YOU PROBABLY DIDN'T KNOW... (OR WERE TOO TIRED TO THINK ABOUT). - The record for the longest period without sleep is 18 days, 21 hours, 40 minutes during a rocking chair marathon. The record holder reported hallucinations, paranoia, blurred vision, slurred speech and memory and concentration lapses.
Adults (including the elderly) 7â8 hours a day. If you routinely lose sleep or choose to sleep less than needed, the sleep loss adds up. The total sleep lost is called your sleep debt. For example, if you lose 2 hours of sleep each night, you'll have a sleep debt of 14 hours after a week. Some people nap as a way to deal with sleepiness. Naps may provide a short-term boost in alertness and performance. However, napping doesn't provide all of the other benefits of night-time sleep.