As per Vedic astrology, Moon dominates the Emotions, feelings, sentiments, his/her way of thinking etc of human. Moon is the significator of mind. The person having ill or healthy effect in horoscope usually feel either too much exited, happy or very sorrow, confused in two stages of moon which are full moon & no moon.
I practically found that these kinds of feelings are too strong one day before or on the same day of full moon & no moon.
If you have further questions, you may ask.