New moon
Start of the phase. "New" cycle.
Full moon
Fully illuminated moon
First Quarter
Lit on the right side, dark on the left.
Third Quarter
Lit on the left side, dark on the right.
Waxing Gibbous
Slightly dark on the left side, mostly lit on the right.
Waning Gibbous
Slightly dark on the right side, mostly lit on the left.
Waning Crescent
Crescent on the left side, dark on the right.
Waxing Crescent
Crescent on the right side, dark on the left.