The workweek and weekend are the complementary parts of the week devoted to labor and rest, respectively. The legal working week (British English), or workweek (American English), is the part of the seven-day week devoted to labor. In most of the world, the workweek is from Monday to Friday and the weekend is Saturday and Sunday, but other divisions exist: for example, many countries observing a Sunday to Thursday or even Monday to Thursday working week. A weekday or workday is any day of the working week. Other institutions often follow this pattern, such as places of education. Sometimes the term „weekend“ is expanded to include the time after work hours on the last workday of the week; e. g. Friday evening is often referred to as the start of the weekend. The weekend has had varying definitions, such as commencing after 5pm on Friday evening and lasting until Sunday 12pm.