What Is a Leap Year?
The calendar that much of the world uses is based on how long it takes Earth to revolve around the sun. It is designed so that seasons line up pretty much the same each year and this helps us to plan effectively. For example, it is important to know when we should be planting so that crops have the best chance of growing.
The orbit does not take an exact number of days, however, making it very difficult to come up with an accurate calendar. As such, calendars have changed over the years to take this into account, while some countries use very different systems to each other. Here’s a closer look on just what a leap year is, and how the calendar has evolved over the years.
