About one-third or 30 percent of human life is spent working. The average working week in the United States consists of 40 hours of work. Most people take a few holidays every year. On an average, most people spend about 25 to 30 years working.
Work forms a major part of adult life, and some people equate happiness with the number of hours spent at the office. Money earned from work helps to put food on the table and pay for shelter and other essentials.
Apart from work, sleep forms an important component of human life. The early years of life are spent in education and the acquisition of skills.
The period after retirement is usually short and depends on life expectancy, which varies in different parts of the world.