The time at which the Moon appears as a narrow waxing crescent
new phase of the moon
New-moon Sentence Examples
That full moon as well as new moon had a religious significance among the ancient Hebrews seems to follow from the fact that, when the great agricultural feasts were fixed to set days, the full moon was chosen.
We cannot tell when the Sabbath became dissociated from the month; but the change seems to have been made before the Book of the Covenant, which already regards the Sabbath simply as an institution of humanity and ignores the new moon.
We note (a) that in the worship of Yahweh the sacred seasons of new moon and Sabbath are obviously lunar.
At the Hindu Festival of Dasara, which lasted nine days from the new moon of October, tents made of canvas or booths made of branches were erected in front of the temples.
In later Christian times the Paschal month was calculated from the astronomical new moon; in earlier Jewish times all months were reckoned to begin at the first sunset when the new moon was visible, which in the most favourable circumstances would be some hours, and in the most unfavourable three days, later than the astronomical new moon.