YOU SAID:

If the month of september has 28 days in one year but 29 in another, why is the 29 days called a leap year, when you ADD a day? Every other month should leap.

INTO JAPANESE

9 月がある年は 28 日ですが、別の年は 29 日である場合、1 日を足すと 29 日が閏年と呼ばれるのはなぜですか?隔月ごとに飛躍するはずです。

BACK INTO ENGLISH

If September has 28 days in one year and 29 days in another, why is the 29th day called a leap year when you add a day?

INTO JAPANESE

9 月がある年は 28 日、別の年は 29 日である場合、1 日追加すると 29 日が閏年と呼ばれるのはなぜですか?

BACK INTO ENGLISH

If September has 28 days in one year and 29 days in another, why is the 29th day called a leap year when you add a day?