beanz Magazine

What Time is It?

Rich Bowen on Flickr

Learn about the origin of Unix time, the calendar system used by digital devices.

You know the day and time when your classes begin but have you thought about what time is? Why 24 hours, for example, or 7 days in a week not 5? Who decided?

Keeping time is a technology and, like many technologies, it’s created by humans to solve problems. Mostly time is used to keep people synchronized. We might agree to have breakfast when the sun rises but what about lunch? What about classes or sports?

Computers have a similar problem. Not only do they have to share data — and a standard way to describe data, but computers also need to manage time to perform tasks and to work with other computers.

Computers use Unix time. The start time is January 1, 1970 at 00:00:00 minus any leap seconds since then. From that moment, computers count forward in units of time that generate a long integer or number which can be translated into dates humans recognize. For example, this issue is released on February 1, 2018 which in Unix time is 1517443200. That’s easy to remember, isn’t it? Computers would tell you 1517443200 is easier to remember.

 

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Also In The February 2018 Issue

In an era before telephones, a clever code was created to send messages by telegraph.

A simple coding activity that creates a virtual tic-tac-toe board with pieces.

Seven days to design, code, and debug a program with PyGame. What could go wrong?

Play with your friends or connect to Minecraft servers all around the world.

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Say hello to your new favorite robot: spherical, programmable, and durable. It can even swim!

The perfect language to help you transition into a new way of coding.

Create a new and improved variation of the classic 1960s board game with micro:bit.

Learn about the origin of Unix time, the calendar system used by digital devices.

Could a human brain be simulated by a computer? Would it think and feel like we do?

Links from the bottom of all the February 2018 articles, collected in one place for you to print, share, or bookmark.

Interesting stories about computer science, software programming, and technology for February 2018.