What lunar phase is considered the absolute best time for viewing faint deep-sky objects regardless of the season?

Answer

The new moon phase (or nights surrounding it).

The Moon is the single biggest destroyer of faint-object viewing; therefore, the best time for deep-sky observation is during the new moon window when the light is absent.

What lunar phase is considered the absolute best time for viewing faint deep-sky objects regardless of the season?

#Videos

Why night skies are better in winter than during summer - YouTube

seasonskyclear