Back to school (marketing) which is unusual in that it starts its school year in spring, the back to school sales are traditionally held in late March. In Canada and the United States, back to school shopping is associated with Labor Day, which falls on the first Monday of September. While Labor Day is a widely-observed holiday, it has no official celebration. Labor Day has since become symbolic as the unofficial "end of summer". Most schools and colleges begin their school year around this time, so the holiday has become a back to school shopping tradition. much as Memorial Day and Victoria Day, and
Determination of the day of the week Determination of the day of the week The determination of the day of the week for any date may be performed with a variety of algorithms. In addition, perpetual calendars require no calculation by the user, and are essentially lookup tables. A typical application is to calculate the day of the week on which someone was born or a specific event occurred. In numerical calculation, the days of the week are represented as weekday numbers. If Monday is the first day of the week, the days may be coded 1 to 7, for Monday through Sunday, as is practiced in