When have we LOST 10 Days? How does the Gregorian calendar work? | On This Day - 4th October |

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On This Day - 4th October : The Orient Express , The Gregorian Calendar, Sputnik 1, supersonic car, largest cash robbery

In 1582 The Gregorian Calendar was introduced by Pope Gregory XIII.
The Julian calendar, that was used before the Gregorian one, miscalculated the length of the solar year by 11 minutes.
Ancient Egyptians are credited for first determining the real length of a solar year.
The original goal of the Gregorian calendar was to change the date of Easter, which was traditionally observed on March 21, but fell further away from the spring equinox with each passing year.

But in 1582 a difference already existed between the proposed Gregorian calendar and the Julian calendar that was used at that time.
Do you know how many days were just removed in order to synchronize the old and the new calendar?

Let's find out, but before, we'd like to kindly ask you to subscribe to our channel If you enjoy our daily episodes.

To overcome the difference that already appeared between the Gregorian Calendar and the Julian calendar, the date was advanced 10 days.
Therefore, Thursday 4 October 1582, was followed by Friday 15 October 1582
Thankfully, the day of the week didn’t change.

Leap years occur every four years except on centennial years that aren’t divisible by 400.
For example there was a leap year in 2000, but not in 1900, 1800, or 1700.
The Gregorian calendar differs from the real solar year by 26 seconds per year.
Since The Gregorian calendar is not perfect, by the year 4909, the Gregorian calendar will be a full day ahead of the solar year.
You may not know that when Sweden swapped the Julian calendar for the Gregorian, they didn’t just drop 10 days like other countries.
Instead, they placed a February 30 on their calendar.
The plan was to omit leap days over the next 40 years, to remove those extra ten days.
Saudi Arabia replaced the lunar-based Hijri Calendar with the Gregorian in 2016.
Probably you are wondering why do we use seven days a week?
This is because The Gregorian calendar followed the lead of ancient Babylon.
Since 600 BC, the seven-day week was based on the phases of the moon and the last day was kept for the new moon phase.

In 1883, The Orient Express made its first run as a long-distance passenger train service.
The original train was simply a normal international railway service, but shortly the name became synonymous with intrigue and luxury travel.

In 1957 Sputnik 1 became the first artificial satellite to orbit the Earth.
The name "Sputnik" came from the Russian word for traveling companion.
It was 58 centimeters in diameter and looked like a polished metal sphere with four external radio antennas that were used to broadcast radio pulses.
Sputnik orbited around the Earth for three weeks before its batteries died.
After this, it orbited silently for two more months before it fell back into the atmosphere.
The satellite traveled around Earth at a speed of about 29000 kilometers per hour.
This meant that it took it 96 minutes to move on each orbit, completing 1440 orbits of the Earth.
The satellite burned up on 4 January 1958, while reentering Earth's atmosphere.

In 1983, Richard Noble set a new land speed record of 633 miles per hour, or 1019 kilometers per hour.
The test was done at the Black Rock Desert in Nevada using a car called Thrust2.
The next supersonic car created by Noble, ThrustSSC, was driven by Andy Green and broke the record at 763 mph or Mach 1.02.
Richard Noble worked on his new project, Bloodhound SSC, which aimed to surpass 1000 mph in 2019, but the project went into bankruptcy and was sold.

In 1997,The second largest cash robbery in U.S. history occurred in North Carolina

By WLDiffusion - Own work, CC BY-SA 4.0,
By Murdockcrc - Own work, CC BY-SA 4.0,
By ian mcwilliams - originally posted to Flickr as Richard Noble - former World Land Speed Record holder, CC BY 2.0,
By Raquel Baranow - Own work, CC BY-SA 3.0,
By Culture Coventry Trust - Own work, CC BY-SA 4.0,
By Jules1982 - Own work, CC BY-SA 4.0,