noun
first day of the month (archaic)
Archaic term for the first day of the month, especially in the lunar calendar. In modern Japanese, 一日 (ついたち) is used instead.
古い文献では、月の初めを「つきたち」と記している。
In old documents, the beginning of the month is written as 'tsukitachi'.
noun
first ten days of the lunar month
Refers to the first ten-day period (初旬) of the lunar month. This usage is historical and not used in modern Japanese.
「つきたち」は、かつて月の上旬を指す言葉として使われた。
'Tsukitachi' was once used to refer to the first ten days of the month.
From 月 (tsuki, 'moon, month') + 立ち (tachi, 'standing, starting'), referring to the start of the lunar month. The kanji 朔 specifically means 'new moon' or 'first day of the lunar month'.