About twice a year.
As a matter of fact, Full Moon is the only time a lunar eclipse can occur.
A lunar eclipse can only occur at Full Moon.Technically, the central moment of the eclipse must be the precise moment of Full Moon.
A lunar eclipse can only occur at the time of Full Moon.
A solar eclipse can only occur at the time of New Moon. A lunar eclipse can only occur at the time of Full Moon.
A lunar eclipse can occur only at the time of the Full Moon.
a full moon
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Lunar eclipse can occur only at the time of Full Moon.
It has to be in new moon.
Lunar eclipses can only occur at the full moon.
A lunar eclipse can only occur during a full moon when the Earth passes between the Sun and the Moon, causing the Earth's shadow to fall on the Moon. This can result in a partial or total eclipse of the Moon.