1999 Lexus LX 470 Owners Manual - Page 107

CLOCK 14X005c The digital clock indicates the time when the ignition key is at the "ACC" or "ON" position. To reset the hour, press the "H" button. To reset the minutes, press the "M" button. To adjust the time to the nearest hour, press the ":00" button. For example, if the ":00" button is pressed when the time is between 9:30 - 9:59 or between 10:01 - 10:29, the time will change to 10:00. If the electrical power source has been disconnected from the clock, the time display will automatically be set to 1:00 (one o'clock). When the headlight switch is turned on, the digital clock indication grows faintly.