The kanji 朔 represents the first day of the lunar month, or new moon. It signifies the beginning, the start of a new lunar cycle. It's often associated with the very beginning, a fresh start, and the commencement of a period.

・On-yomi (音読み): サク (saku) ・Kun-yomi (訓読み): None, or used as a component of other words.

⚫︎朔日（ついたち） Translation: The first day of the month; the new moon. ⚫︎旧暦の朔日（きゅうれきのついたち） Translation: The first day of the lunar calendar; the new moon in the old calendar. ⚫︎朔旦（さくたん） Translation: The first day of the year (specifically in the lunar calendar).

The kanji 朔 is a pictograph. It depicts the moon's shape on the first day of the lunar month (the new moon), where it appears as a thin crescent or is completely invisible, symbolizing the start of the lunar cycle. The character evolved from an older form that visually represented this concept.