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.
People who sleep about seven hours a night live the longest, three huge studies have found, the newest out in the February issue of the journal SLEEP.fter accounting for all of these factors, adults getting an average of seven hours had the lowest death rates. Surprisingly, less sleep, even as little as four hours a night, didn't significantly increase deaths for men and only lowered survival for women if they averaged less than four hours.