The time of day when the sun appears to be in the middle of the sky is called solar noon. It is the moment when the sun reaches its highest point in the sky for a given location. Solar noon occurs once a day, and the exact time varies based on the location and time of year due to the Earth's rotation and the tilt of its axis. Typically, solar noon is around midday or noon, but it can be slightly before or after depending on your location and the specific date.