Time is an illusion

Time is an illusion, lunch time doubly so.

Have you ever wanted to know what goes on when you run datetime.datetime.utcnow().isoformat()?

How does your computer know what UTC is?

Why should you use UTC?

Where should we go for lunch?

This talk is about the use to date and time in computing.

Covering precision from years to nanoseconds, discontinuities from Julian to Gregorian, day light savings and down to leap seconds. From measuring time with sundials to cesium atomic clocks.

With practical tips on timezones, parsing, formatting, changing time for testing and packages to make your life easier.

Presented by

Dave Collins

Dave Collins is a carbon-based life form from Melbourne, Australia. He has been programing for over 25 years and getting paid for it for more than 15. Over this time he has written in C, Java, C#, C++ and SQL. He now mainly writes python on Linux computers. Is currently writing code to control the weather ... sorry forecast the weather for the Bureau of Meteorology. He still thinks digital watches are a pretty neat idea.


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