I was totally puzzled by the same problem - - followed the Owner's Manual instructions explicitly to no avail. Problem is - - there are two (2!) DISP buttons - - a prominent one on the dashboard - - a less prominent one on the steering wheel. It's the steering wheel one that you want to press and hold to access the clock reset functions. (Then make a note in your Owner's Manual that it's the DISP button on the steering wheel.)
The 2012 Toyota Highlander has 16 valves.
The 2012 Toyota Highlander is a gas-powered vehicle.
The 2012 Toyota Highlander has an inline 4 engine.
The 2012 Toyota Highlander has a drag coefficient of 0.34 Cd.
The 2012 Toyota Highlander has double overhead cam (DOHC).
The height of the 2012 Toyota Highlander is 5 ft. 8.1 in. (68.1 in.).
The 2012 Toyota Highlander-Hybrid has 24 valves.
The 2012 Toyota Highlander's turning circle is 38.7 ft..
The 2012 Toyota Highlander has a 23.0 degrees angle of departure.
The 2012 Toyota Highlander is 15 ft. 8.4 in. (188.4 in.) long.
The maximum payload of the 2012 Toyota Highlander is 1554 lbs..
The 2012 Toyota Highlander has a 22.0 degrees angle of approach.