Late night television refers to the block of programming that follows primetime and comes before the overnight or "graveyard" hours (graveyard slot). In the United States, this period traditionally begins around 11:30 p.m. and can extend into the early morning; exact scheduling varies by network and local affiliates. Local evening newscasts (local news) commonly lead into the late-night lineup on broadcast stations.
Typical format and features
Late-night shows usually combine a mix of elements designed for a mostly adult, night-time audience: a cold open, a host monologue, celebrity interviews, musical performances, pre-recorded field pieces, and recurring comedy bits. Many programs use a desk-and-chair set, a house band, and occasional sidekicks or recurring characters. Short, shareable segments are often edited for online platforms to reach viewers who do not watch live television.
History and development
The modern late-night talk show evolved in the mid-20th century from variety and radio traditions. Over decades the format has been shaped by influential hosts and producers who set conventions still seen today. In recent decades late night has become a platform for political satire and topical comedy, expanding its role beyond celebrity promotion to social commentary.
Contemporary examples
Major U.S. broadcast networks maintain flagship late-night franchises. For example, The Late Show with Stephen Colbert airs on CBS, while The Tonight Show Starring Jimmy Fallon is a long-running franchise on NBC. On ABC, an example is Jimmy Kimmel Live! These programs represent a mixture of interviews, comedy sketches and musical guests and often influence online and social-media trends.
Importance and variations
Late-night television serves several roles: entertainment, promotion for films and albums, and a venue for cultural and political discussion. Formats vary internationally and across cable, network and streaming platforms; some markets favor panel shows or sketch comedy, while others keep the desk-based talk show model. Syndicated and cable late-night offerings can target niche audiences with edgier or more specialized content.
Notable distinctions
- Network late-night blocks are usually subject to affiliate decisions about exact start and end times.
- Digital distribution has changed how success is measured — clips, podcasts and streaming views now complement traditional Nielsen ratings.
- Late-night hosts frequently shape public conversation through monologues and interviews, giving the genre outsized cultural influence despite smaller live audiences.