１５日
じゅ
う
ご
に
ち
Meanings
1
15th day of the month
Refers to the 15th day of a month, often used in dates, schedules, and deadlines.
The meeting will be held on the 15th.
2
15 days
Indicates a duration of 15 days; often used with counters or in expressions of time span.
This medicine is a 15-day supply.