also: ち
suffix
nth day (of the month)
Colloquial suffix attached to a number to indicate a specific day of the month. Equivalent to standard 〜日 (にち).
See also: 日 (にち)
今日は10んちだよ。
Today is the 10th.
counter
Colloquial counter used after a number to count days. Equivalent to standard 〜日 (にち).
See also: 日 (にち)
あと3んちで夏休みだ。
Summer vacation starts in three more days.
Standard, non-colloquial suffix and counter for days. んち/ち is a casual spoken contraction.
Colloquial contraction of 〜日 (にち). The に is reduced to ん, yielding んち, or dropped entirely to ち.