9. How many days are there in a leap year?​

A leap year has 366 days. This is because it includes an extra day, February 29th, to keep the calendar year synchronized with the astronomical year, which is approximately 365.2422 days long. Leap years occur every four years, except for years that are divisible by 100 but not by 400. So, for example, the year 2020 was a leap year, and the next one will be 2024.

Ответ: 366 days

Пошаговое объяснение: