World Sleep Day is observed every year on the Friday before the spring equinox. In 2026, it falls on March 13.
The day was created by the World Sleep Society to raise awareness about the importance of healthy sleep and the problems caused by sleep disorders.
Why sleep is important
Sleep is not just rest. While we sleep, the body and brain are busy doing important work.
The brain processes information from the day, stores memories and helps the body recover. Sleep also supports the immune system, which helps protect us from illness.
Children and teenagers especially need enough sleep for healthy growth and learning.
Did You Know?
Humans spend about one third of their lives sleeping. Some animals sleep much longer. Koalas can sleep up to 20 hours a day, while dolphins sleep with only half of their brain at a time.
How much sleep people need
Sleep needs vary by age.
Most school-age children need about 9 to 11 hours of sleep each night. Teenagers usually need about 8 to 10 hours. Adults generally need around 7 to 9 hours. However, many people around the world do not get enough sleep.
A global problem
Experts say sleep deprivation has become a common problem.
Late-night screen time, stress, busy schedules and irregular sleep habits can all make it harder for people to sleep well.
Lack of sleep can affect mood, concentration and overall health.
How people mark the day
World Sleep Day encourages people to learn about healthy sleep habits.
Doctors and sleep experts often share advice such as keeping a regular bedtime, avoiding screens before sleep and creating a quiet, comfortable sleeping environment.
The day is also used to highlight sleep disorders such as insomnia and sleep apnea.
The message of World Sleep Day is simple: Sleep Well, Live Better.
