A Weekly Market is so-called Because it is held on a

A weekly market is so-called because it is held on a __________.   

Answer: Specific day of the week.

A weekly market is so-called because it is held only on a specific day of the week. These markets do not have traders with permanent shops. These traders arrange their shops in the morning and pack their bags in the evening after selling their products. These weekly markets have products which are cheaper than the other shops in the market.