6 AM is pretty close to sunrise, so if the Moon is setting while the Sun is rising, then the Moon must be pretty close to being Full.
If the Moon is setting at about the time the Sun is rising, then the Moon is (approximately) full.
If the Moon is setting at 6 AM, then it is pretty close to being full.
full moon
If the moon is setting at 6am then it is a New Moon
Full Moon -> Waxing gibbous phase -> First quarter phase -> Waxing crescent phase -> New moon -> Waning crescent phase -> Last quarter phase -> Wanning gibbous phase -> Full Moon
New Moon Phase
In the new Moon phase.
The moon will disappear when it is in the new moon phase, as ironic as that sounds.
If the moon is setting at 6am then it is a New Moon
The first phase after new moon which is Waxing Crescent.
Phase of the Moon on 6 February: waxing gibbous with 89% of the Moon's visible disk illuminated.
The moon was in its waxing crescent phase, appearing 33% illuminated at 6 PM UTC.
The "waning gibbous" phase lasts from 2 days after the full to 6 days after the full.
New Moon.
The Moon was full two days ago, so for the next 5 days the Moon will be in the "waning gibbous" phase. On Saturday, 2/6/10, the Moon will be at the Third Quarter phase.
The Moon's phase is New Moon.
Today, January 1, 2011, the Moon is in the "waning crescent" phase with about 6% of the visible face of the Moon illuminated. There will be a partial solar eclipse on January 4, which can only occur at the precisely "new" moon.
"First Quarter" is the phase when the moon appears half-illuminated, and rises and sets roughly 6 hours (1/4 day) after the sun.
Full Moon -> Waxing gibbous phase -> First quarter phase -> Waxing crescent phase -> New moon -> Waning crescent phase -> Last quarter phase -> Wanning gibbous phase -> Full Moon
A waxing Moon can be seen when the Moon is larger in the sky, and is moving from the new Moon phase, and into the full Moon phase. A waning Moon is seen when the Moon is visibly smaller in the sky, and is moving from the full Moon phase, and into the new Moon phase.