Gregorian calendar

In the "Gregorian calendar," which many people are familiar with, an extra day is typically added to the month of "February" every few years. However, this doesn't always happen consistently. The reason behind this is due to the phenomenon of the Earth's rotation around itself and its orbit around the Sun. When the Earth completes one rotation (approximately 24 hours), it results in the occurrenc.. ดูเพิ่ม