二日

1. Origins, structure, and basic meaning

• Structure: The spelling is 二日, read ふつか, and it is a noun meaning either a period of two days or the second day of a month.
• Basic usage: 二日 means two days when measuring duration and the second day when giving a calendar date.

2. Common pitfalls and similar expressions

• Length of a stay and a date on the calendar
  • Both examples use the form 二日. The first measures a two-day stay at a destination; the second identifies August 2 as the date of a festival.
• Two days at a destination and an August festival date
  • 旅行先には二日滞在します。 — We will stay at our destination for two days.
  • 八月二日に町の祭りが開かれる。 — The town festival will be held on August second.