https://www.hollywoodreporter.com/tv/tv-news/nbc-tonight-show-drop-friday-cuts-four-nights-per-week-1235993686/#:~:text=NBC's%20'Tonight%20Show'%20to%20Drop,place%20at%20CBS%20and%20ABC.

NBC's 'Tonight Show' to Drop Friday Show (https://www.reddit.com/r/television/comments/1famcgb/nbc_pulls_back_tonight_show_to_four_nights_per/) in Shift (https://www.reddit.com/r/LateNightTalkShows/comments/1exhnud/looks_like_jimmy_fallon_has_stopped_doing_friday/) to Four-Day Schedule. Going forward, the Jimmy Fallon-hosted late night show will run repeats on Fridays, a move already in place at CBS and ABC.

Jimmy Kimmel reacts to Jimmy Fallon getting Fridays off (https://www.the-independent.com/arts-entertainment/tv/news/jimmy-fallon-jimmy-kimmel-nbc-cancelled-b2609289.html)