2003–04 United States network television schedule (late night)

These are the late night schedules for the four United States broadcast networks that offer programming during this time period, from September 2003 to August 2004. All times are Eastern or Pacific. Affiliates will fill non-network schedule with local, syndicated, or paid programming. Affiliates also have the option to preempt or delay network programming at their discretion.

Legend

Light blue indicates Local programming.
Gray indicates encore programming.
Yellow indicates late night talk or variety shows.
Gold indicates network news programming.

Schedule

Monday-Friday

Network	11:00 PM	11:35 PM	12:00 AM	12:30 AM	1:00 AM	1:35 AM	2:00 AM	3:00 AM	4:00 AM	4:30 AM	5:00 AM
ABC	Local Programming	Nightline	Jimmy Kimmel Live! (12:07)		Local Programming		ABC World News Now				ABC World News This Morning
CBS	Local Programming	Late Show with David Letterman		The Late Late Show with Craig Kilborn		Local Programming	Up to the Minute				CBS Morning News
NBC	Local Programming	The Tonight Show with Jay Leno		Late Night with Conan O'Brien (12:35)		Last Call with Carson Daly (1:35)	Local Programming	The Tonight Show with Jay Leno (R)	Local Programming	Early Today	Local Programming

Note: Craig Kilborn left The Late Late Show at the end of August 2004, with guest hosts taking his place until Craig Ferguson was selected as the permanent host.