The new moon isn't visible in the sky because it's positioned between the Earth and the Sun. This means it's essentially lost in the Sun's glare.

Therefore, there is no specific time when the new moon is "highest in the sky" because it's not actually visible.

However, the new moon does pass through the sky like any other celestial body, and technically, its highest point would be at solar noon for your location. This is the time when the Sun is at its highest point in the sky.