The next upcoming Cyber Monday is on Monday December 2, 2019.
People go to work and take advantage of the holiday sales online while their working because they cannot physically go to the shopping malls. To get as many people as possible shopping, many online retailers will offer their best sales prices on this day.
Since the huge growth of online sales over the past 20 years this day has become the largest single day of the year with online sales. Year over year sales growth continues to grow each year.