1998–99 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 1998 to August 1999. 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	1:30/1:35 AM	2:00 AM	3:00 AM	3:30 AM	5:30 AM
ABC		Local Programming	Nightline	Politically Incorrect with Bill Maher (12:07)	Local Programming		ABC World News Now		Local Programming	ABC World News This Morning
CBS	Fall	Local Programming	Late Show with David Letterman		The Late Late Show with Tom Snyder	Local Programming	Up to the Minute	Local Programming		CBS Morning News
CBS	Spring	Local Programming	Late Show with David Letterman		The Late Late Show with Craig Kilborn	Local Programming	Up to the Minute	Local Programming		CBS Morning News
NBC		Local Programming	The Tonight Show with Jay Leno		Late Night with Conan O'Brien	Later (Monday-Thursday) Friday Night (Friday, 1:35-2:35)	Local Programming			NBC News at Sunrise