Originally a weekday two-hour program from 7:00 a.m. to 9:00 a.m., it expanded to Sundays in 1987 and Saturdays in 1992. The weekday broadcast expanded to three hours in 2000, and to four hours in 2007 (though over time, the third and fourth hours became distinct entities). Today’s dominance was virtually unchallenged by the other networks until the late 1980s, when it was overtaken by ABC’s Good Morning America.

Today retook the Nielsen ratings lead the week of December 11, 1995, and held onto that position for 852 consecutive weeks until the week of April 9, 2012, when Good Morning America topped it again. Today maintained its No. 2 status behind GMA from the summer of 2012 until it regained the lead in the aftermath of anchor Matt Lauer’s departure in November 2017. In 2002, Today was ranked No. 17 on TV Guide’s 50 Greatest TV Shows of All Time.

On July 15, 2020, NBC launched Today All Day, a 24-hour digital streaming extension of the program available through its website and Peacock.

According to en.wikipedia.org. Source of photo: internet