Which pole is colder, the North or the South?

Both Polar Regions of the earth are cold, primarily because they receive far less solar radiation than the tropics and mid-latitudes do. At either pole the sun never rises more than 23.5 degrees above the horizon and both locations experience six months of continuous darkness. Moreover, most of the sunlight that does shine on the Polar Regions is reflected by the bright white surface.

The South Pole the average temperature is about 56 degrees below zero degrees Fahrenheit (−49 degrees Celsius). At the North Pole the average temperature is a relatively balmy 20 degrees below zero (−29 degrees Celsius).

Why do we have leap years?

Calendars are fairly fixed things. Each year has the same number of months and days, and the days follow a seven-day rotation going from Sunday to Saturday. But the movements of Earth do not conform exactly to the time designations humans have imposed.

Why are there 365 days in a year?

A long time ago (thousands of years, in some cases), when ancient societies recognized the need to record events and plan future happenings, calendars came into being. In colder climates, a calendar reflected the changing of the seasons and the movements of Earth around the Sun.