We often, according to the language, take a flying leap. Or leap at the chance. Or grow by leaps and bounds. We even, at times, leap to conclusions — although we are more likely to jump in that instance.
And while we often might take a leap of faith, it is only once every four years that we have a leap day. So, we come today to wish everybody a happy leap day, that Feb. 29 on the calendar that appears once every quadrennium. Although 1,460 days have passed since the last time we acknowledged an extra day on the calendar, nothing during that time has eased confusion over exactly why some years are longer than others.
Well, we’re glad you asked. According to the History Channel: “Put simply, these additional 24 hours are built into the calendar to ensure that it stays in line with the Earth’s movement around the sun. While the modern calendar contains 365 days, the actual time it takes for Earth to orbit its star is slightly longer — roughly 365.2421 days. The difference might seem negligible, but over decades and centuries, that missing quarter of a day per year can add up. To ensure consistency with the true astronomical year, it is necessary to periodically add in an extra day to make up the lost time and get the calendar back in sync with the heavens.”
In other words, leap day is necessary to prevent summer from eventually lurching into December in the Northern Hemisphere. And we certainly would not want to be out of synch with the heavens.