Muslim people keep Friday as the day of rest. The Qur'an refers to Friday as the "king of days."
Jewish people keep Saturday as the day of rest. They reckon that, on this day, God rested after creating the world.
Most Christian people keep Sunday as the day of rest because it is the Day of Resurrection. Seventh-Day Adventists are the exception.
The Baha'i keep Friday as their day of rest.
Many Eastern Orthodox Christians honour Saint John the Baptist on Tuesdays, if there is no other saints day appointed to the calendar date.
An old German tradition holds that Thursday is the unluckiest day of the week, so much so that people avoided signing contracts or being married on a Thursday.
In India, Saturday is considered in some place to be unlucky because of its connection with Sani, the God of Misfortune.
In Roman Catholic tradition, Saturday is devoted to the veneration of the Blessed Virgin, the first Saturday of the month, especially.
The difference between the days of the week is found in what people ascribe to the them.
