a new moon is a kind of phase of the moon & a moon phase occurs 28 days after the last time it occurred ->  a new moon will occur 28 days after the last time it occurs  a new moon will occur 28 days after the last time it occurs & a new moon occurred on june 2 ->  the next new moon will occur 28 days after june 2  the next new moon will occur 28 days after june 2 & 2 plus 28 equals 30 -> the next new moon will occur on june 30