1998–99 United States network television schedule (late night)
# 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 | Network | 11:00 PM | 11:35 PM | 12:00 AM | 12:30 AM | 1:00 AM | 1:30/1:35 AM | 2:00 AM | 2:30 AM | 3:00 AM | 3:30 AM | 4:00 AM | 4:30 AM | 5:00 AM | 5:30 AM |
| - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| ABC | ABC | Local Programming | Nightline | Politically Incorrect with Bill Maher (12:07) | Local Programming | Local Programming | Local Programming | ABC World News Now | ABC World News Now | ABC World News Now | Local Programming | Local Programming | Local Programming | Local Programming | ABC World News This Morning |
| CBS | Fall | Local Programming | Late Show with David Letterman | Late Show with David Letterman | The Late Late Show with Tom Snyder | The Late Late Show with Tom Snyder | Local Programming | Up to the Minute | Up to the Minute | Local Programming | Local Programming | Local Programming | Local Programming | Local Programming | CBS Morning News |
| CBS | Spring | Local Programming | Late Show with David Letterman | Late Show with David Letterman | The Late Late Show with Craig Kilborn | The Late Late Show with Craig Kilborn | | Local Programming | Up to the Minute | Up to the Minute | Local Programming | Local Programming | Local Programming | Local Programming | Local Programming | CBS Morning News |
| NBC | NBC | Local Programming | The Tonight Show with Jay Leno | The Tonight Show with Jay Leno | Late Night with Conan O'Brien | Late Night with Conan O'Brien | Later (Monday-Thursday) Friday Night (Friday, 1:35-2:35) | Local Programming | Local Programming | Local Programming | Local Programming | Local Programming | Local Programming | Local Programming | NBC News at Sunrise |

Note: NBC Nightside was cancelled in September 1998

### Saturday

| Network | Network | 11:00 PM | 11:30 PM | 12:00 AM | 12:30 AM | 1:00 AM | 1:30 AM | 2:00 AM | 2:30 AM | 3:00 AM | 3:30 AM | 4:00 AM | 4:30 AM | 5:00 AM | 5:30 AM |
| - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| NBC | NBC | Local Programming | Saturday Night Live | Saturday Night Live | Saturday Night Live | Local Programming | Local Programming | Local Programming | Local Programming | Local Programming | Local Programming | Local Programming | Local Programming | Local Programming | Local Programming |
| Fox | Fox | MADtv | MADtv | Local Programming | Local Programming | Local Programming | Local Programming | Local Programming | Local Programming | Local Programming | Local Programming | Local Programming | Local Programming | Local Programming | Local Programming |
