- published: 29 Jan 2013
- views: 633937
Unix time (also known as POSIX time or Epoch time) is a system for describing instants in time, defined as the number of seconds that have elapsed since 00:00:00 Coordinated Universal Time (UTC), Thursday, 1 January 1970, not counting leap seconds. It is used widely in Unix-like and many other operating systems and file formats. Because it does not handle leap seconds, it is neither a linear representation of time nor a true representation of UTC. Unix time may be checked on most Unix systems by typing
on the command line.date +%s
Two layers of encoding make up Unix time. These can usefully be separated. The first layer encodes a point in time as a scalar real number, and the second encodes that number as a sequence of bits or decimal digits.
As is standard with UTC, this article labels days using the Gregorian calendar, and counts times within each day in hours, minutes, and seconds. Some of the examples also show International Atomic Time (TAI), another time scheme, which uses the same seconds and is displayed in the same format as UTC, but in which every day is exactly 86400 seconds long, gradually losing synchronization with the Earth's rotation at a rate of roughly one second per year.
Time will "end" for 32-bit computers on 19 January, 2038. James Clewett explains. We love this real time Unix clock: http://www.coolepochcountdown.com/ Website: http://www.numberphile.com/ Numberphile on Facebook: http://www.facebook.com/numberphile Numberphile tweets: https://twitter.com/numberphile Google Plus: http://bit.ly/numberGplus Videos by Brady Haran
People keep finding bugs in iPhones, and other people keep asking me to make videos about them. So here you go! Here's a tale of binary, of the Unix epoch, and a date beyond the lifespan of the universe. GET IN TOUCH: http://tomscott.com - TWITTER http://twitter.com/tomscott - FACEBOOK http://facebook.com/tomscott - INSTAGRAM tomscottgo THANK YOU SO MUCH to Michael Monteith, @mike220889 on Twitter, who was able to get me a conference room to film in on a Friday afternoon at very short notice!
http://geeks.pirillo.com - http://live.pirillo.com - Epoch time started January 1, 1970. According to the Epoch clock, we hit 1234567890 today! Now you will be able to say where you were when that time passed! I swear it, gumdrops were falling from the sky in Seattle, and yes - I really did chair dance! http://chris.pirillo.com
Epoch time 1234567890 http://www.coolepochcountdown.com/
A clock that displays time as the number of seconds that have elapsed since midnight UTC on January 1, 1970. This is how computers "tell" the time. Midnight UTC, January 1, 1970, is the start of the Unix Epoch. It is the date computer scientists chose when they had to agree on a universal date to start counting time from. The number of seconds since the epoch is represented as a 32-bit binary integer. Binary is a number system with two values , generally represented as 1 and 0. (Normal numbers, written with 0-9, use what is called the decimal system.) In this case, 1 and 0 are represented by the LED either being on or off. The clock contains the following components: 1 - Arduino Uno 2 - TLC5490NT 32 - 3mm red LEDs 1 - DS1307-based RTC (Tiny RTC) For a more in depth description of Un...
Working with EPOCH / Unix time can frequently make analyzing data over time more difficult for normal users. In this video, we show you how easy it is for users to convert timestamps stored in EPOCH time to a human readable, Date/Time format using Spotfire. To try a free trial of Spotfire Desktop yourself, go to http://spotfire.tibco.com.
This specific tutorial is a single movie from chapter two of the PHP with MySQL Beyond the Basics course presented by lynda.com author Kevin Skoglund. Watch more at http://www.lynda.com/PHP-tutorials/php-with-OOP-beyond-the-basics/653-2.html?utm_medium=viral&utm;_source=youtube&utm;_campaign=videoupload-lynda-653-0203 The complete course has a total duration of 10 hours and 27 minutes. PHP with MySQL Beyond the Basics table of contents: Introduction 1. Installation and Project Setup 2. Intermediate PHP Techniques 3. Introduction to Object-Oriented Programming (OOP) 4. OOP in Practice 5. Photo Gallery Project Setup 6. Foundations of an OOP Project 7. Working with Files and Directories 8. Uploading Files 9. Completing the User Class 10. The Photograph Class 11. The Comment Class 12. Paginati...
Party at Videoplaza (http://www.videoplaza.com ) in Stockholm to celebrate the unix event (yes, we're geeks). What's this about? Read more about this event at Wikipedia: http://en.wikipedia.org/wiki/Unix_time It was celebrated all over the world. Luckily for us in the Stockholm timezone, it happened half an hour after midnight Friday night, making it an excellent excuse to throw a party. PS. Videoplaza is a startup building advertising solutions for online video (such as the one you're watching). They're looking for talented Flash coders. http://www.videoplaza.com/about/join-us/