What Is A Leap Year and Why Do We Have Them?

As you know, last month had an extra day in it. Every four years, the month of February has 29 days instead of the normal 28. Have you ever wondered why that is? This episode of the Dot Com Lunch explains what a leap year is and why we have them.

Also, since it’s Super Saturday, we had to talk a bit of politics, and Donald Trump’s crazy run towards the GOP nomination. Whatever you may think of it, one thing’s for sure. It’s not boring.

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6 thoughts on “What Is A Leap Year and Why Do We Have Them?”

  1. Rudy says:

    The earth evolved 365 1/4 days …. so 1/4 every 4 years become 1. .. so every four years of the date in February there were 29 …. this year called leap year …

    1. John Chow says:

      That’s the easy way to explain it. I chose the more complex way. 🙂

      1. Alex Shaikh says:

        John; not a kiss ass kind of person but your explains it more in detailed! thanks though. Crazy theory behind all this 😀

  2. MotorBeam says:

    NIce to see the dedication of the meets

  3. DW says:

    The “sidereal day” (the amount of time it takes for the Earth to make a complete rotation with respect to a distant star) is indeed about 23 hours 56 minutes. The reason we don’t just “fix the clocks” is because nobody outside of astronomers cares about sidereal days. Instead, we care about how long it takes for the Earth to make a complete rotation with respect to the closest star, the Sun. Since the Earth is revolving around the Sun at the same time the Earth is rotating on its axis, it takes 24 hours for a point on the Earth to rotate from “high noon” to “high noon”. The solar day is 24 hours long.

    Every four years brings a leap year because it takes about 365 1/4 24-hour days for the Earth to make a complete revolution around the Sun. However, even this is not completely accurate. Every 100 years, the leap year is skipped, because adding 1/4 of a day every 4 years actually adds a little too much. And even THAT is not completely accurate, because every 400 years, that leap day has to be added anyway. Thus, 1900 was not a leap year, but 2000 was.

    And that’s not the whole story either. “Leap seconds” are added or subtracted from time to time, as needed, just to keep the clocks and the calendars synchronized as well as they can be.

    Add to that the fact that the Earth’s rotation is gradually slowing down, so days are ever so gradually getting longer, and it’s clear that if President Trump doesn’t blow the whole thing up to prove that his fat stubby fingers are big enough to push the button, we’ll have to be adjusting the calendar and the clock for centuries to come.

  4. John Cregg says:

    Well a little bit complicated to understand but I got it. Thanks. lol

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