Here's why:

* New Moon Phase: During the new moon phase, the moon is positioned between the Earth and the Sun. This means the sunlit side of the moon is facing away from Earth, making it invisible to us.

* Moon's Path: The moon's path across the sky (its orbit) is determined by its position relative to the Sun and Earth. While the moon does reach its highest point in the sky at a particular time each night, this is not dependent on its phase.

So, to answer your question, there is no specific time when the new moon is "highest in the sky" because it is not visible during this phase.