The foreign exchange market is open for trading in different time zones around the world from Monday to Friday. For example, the Asian market opened on Sunday afternoon, while the American market closed on Saturday morning, Asian time. So the real closing time of the foreign exchange market is 1.5 days per week.

Knowing this, we can calculate how many foreign exchange trading days there are in a year:

365 days a year -(52 weekends x 1.5)- New Year holiday = 286 days.

So the foreign exchange trading day of a year is actually 286 days.