How many years ago was 1820?

How long ago was 1820?

To put into perspective how long ago 1820 was:

• Twenty decades have passed since then.
• Telephones did not exist at the time.
• The Moon is moving away from Earth at roughly 1.49 inches per year. That means that it has moved away by about 304 inches since 1820.
• There have been roughly 10,608 weekends since then.
• Women were not allowed to vote in the United States.
• Doctors were not aware that they needed to wash their hands in order to prevent infection.
• Blue jeans did not exist in 1820.
• The first photograph hadn't been taken yet.
• The word "dinosaur" wasn't coined until 21 years later.
• Slavery in the United States was still legal.
• Japan was still a very secluded and isolated country.
• Beethoven was still alive.
• The Earth has travelled 918 billion miles through space since 1820.
• Due to the expansion of the Atlantic Ocean, the distance between the United States and Europe has grown 5 meters since 1820.
• Napoleon Bonaparte was still alive.