Newmoon, also known as Neomenia in Greek, refers to the first visible crescent of the moon after it has conjugated with the sun, marking the beginning of a new lunar cycle. In Hebrew, it is called Rosh Chodesh (ראש חודש), which translates to "the head of the month." In Arabic, it is known as Hilal (هلال), and in Japanese, it is referred to as Shingetsu (新月). The new moon holds significant cultural, religious, and astronomical importance across various civilizations. In many lunar and lunisolar calendars, such as the Hebrew calendar and the Chinese calendar, the new moon marks the start of a new month. Additionally, the new moon has been historically used to set dates for religious observances, agricultural activities, and other time-sensitive events. Astronomically, the new moon occurs when the moon is positioned between the Earth and the sun, making it invisible from Earth due to the illuminated side facing away from the observer.