kalendarnummers
- 在住国：日本
- 現在地：未設定
- 出身国：日本
- 出身地：未設定
Calendar week numbers are calculated based on the Gregorian calendar. The first week of the year is the week that contains the first Sunday of the year. The week that ends on the last Sunday of the year is the 52nd or 53rd week of the year.
支援者になっているプロジェクトはまだありません。
