The Test format was seeing a decline in its following due to the increasing popularity of the T20s. The International Cricket Council (ICC) thought of bringing in some changes to the Tests to restore the fans’ interest in cricket’s "purest format" and came up with the innovation of the day-night Test matches.
The day-night Tests begin in the afternoon and end late in the evening. Due to the visibility factor under floodlights, a pink ball is be used instead of the red ball.