Hacker News with Generative AI: Time

Time Dilation Formula / Calculator (timedilationformula.com)
Time dilation is like a magic trick that happens when you travel really fast. The faster you go, the slower time moves for you compared to people standing still on Earth!
Physics, Time, Relativity
50 points by mpclarkson 8 days ago | 52 comments
All clocks are 30 seconds late (victorpoughon.fr)
OK, this is going to sound crazy: I believe all clocks are 30 seconds late.
Time, Physics, Opinion
370 points by fouronnes3 11 days ago | 357 comments
Killing Orson Welles at Midnight (2011) (nybooks.com)
It’s two in the afternoon. No one is groaning; no one turns over in bed or hits an alarm clock—it’s much too late for that. Love set you going like a fat gold watch.… But by two o’clock the morning song is just a memory. We are no longer speculating as to what set us going, we just know we are going. We are less sentimental in the afternoon. We watch the minute hand go round: 2:01 becoming 2:02 becoming 2:03.
Time, Literature, Death
19 points by bookofjoe 13 days ago | 4 comments
Dark Energy May Not Exist: Something Stranger Might Explain the Universe (sciencealert.com)
There might not be a mysterious 'dark' force accelerating the expansion of the Universe after all. The truth could be much stranger – bubbles of space where time passes at drastically different rates.
Cosmology, Physics, Universe, Time
74 points by NelsonMinar 14 days ago | 76 comments
A brief history of Time Scales (ucolick.org)
A definition for the term "time scale": 16th General Assembly of the International Astronomical Union Grenoble, France (1976) Resolution No. 4 by Commissions 4 (Ephemerides) and 31 (Time) 3.(a) a useful time scale is generated by any process which enables dates to be assigned to events
Astronomy, History, Time
4 points by geerlingguy 16 days ago | 0 comments
Experimental evidence photon can spend negative amount of time in an atom cloud (arxiv.org)
Physics, Quantum Mechanics, Time, Experiments, Atomic Physics
4 points by belter 16 days ago | 0 comments
An Unreasonable Amount of Time (allenpike.com)
Years ago, Teller performed a magic trick.
Magic, Time, Performance
545 points by memalign 18 days ago | 89 comments
The Long, Painful History of Time (1999) (naggum.no)
The programming language Common Lisp offers a few functions to support the concept of time as humans experience it, including GET-UNIVERSAL-TIME, ENCODE-UNIVERSAL-TIME, DECODE-UNIVERSAL-TIME, and GET-DECODED-TIME. These functions assume the existence of a timezone and a daylight saving time regime, such that they can support the usual expression of time in the environment in which a small number of real-life applications run.
Programming Languages, Time, History, Common Lisp
27 points by b-man 19 days ago | 7 comments
What is a second? (johndcook.com)
The previous post looked into the common definition of Unix time as “the number of seconds since January 1, 1970 GMT” and why it’s not exactly true. It was true for a couple years before we started inserting leap seconds. Strictly speaking, Unix time is the number of non-leap seconds since January 1, 1970.
Time, Unix Time, Programming, Computer Science, History
74 points by zdw 20 days ago | 33 comments
Maps that show time instead of space (youtube.com)
Maps, Visualization, Time, Data
5 points by hydrolox 20 days ago | 1 comments
Seconds Since the Epoch (aphyr.com)
This is not at all news, but it comes up often enough that I think there should be a concise explanation of the problem. People, myself included, like to say that POSIX time, also known as Unix time, is the number of seconds since the Unix epoch, which was 1970-01-01 at 00:00:00.
Unix, Programming, Time, Software
298 points by zdw 23 days ago | 220 comments
Scientists observe 'negative time' in quantum experiments (phys.org)
Scientists have long known that light can sometimes appear to exit a material before entering it—an effect dismissed as an illusion caused by how waves are distorted by matter.
Quantum Physics, Science, Time
16 points by pseudolus 26 days ago | 8 comments
Eliminating Daylight Savings Time would make the average American’s life darker (natesilver.net)
Last week, President-elect Trump pledged to “eliminate” Daylight Savings Time1, which he called “inconvenient, and very costly to our Nation”. The idea may have been inspired by DOGE, the Department of Government Efficiency, an agency set to be run by Elon Musk and Vivek Ramaswamy, after Musk and Ramaswamy pitched a similar plan earlier this month.
Politics, Time, Science, Social Impact
28 points by JeremyNT 31 days ago | 60 comments
RFC 9557: Date and Time on the Internet: Timestamps with Additional Information (rfc-editor.org)
This document defines an extension to the timestamp format defined in [RFC3339] for representing additional information, including a time zone.
Networking, Time, Standards, RFC
31 points by rdpintqogeogsaa 41 days ago | 23 comments
The mind-bending new science of measuring time (ft.com)
The mind-bending new science of measuring time
Science, Physics, Time
14 points by gronky_ 56 days ago | 3 comments
Railroads inspired the creation of time zones (bbc.com)
The invention of railroads ushered in a new era of land travel, and forever changed the way humans perceive time.
History, Transportation, Time
5 points by rmason 59 days ago | 0 comments
The Charms of Catastrophe (1978) (nybooks.com)
“All things,” said Charles Peirce, “swim in continua.” At what wave length does blue become green? When does a child become a grown-up? Are viruses alive? Do cows think? It is also obvious that there are discrete “things” that swim in these spectrums, and sometimes jump from one part of a spectrum to another. Day fades into night, but a flicked switch produces instant darkness.
Philosophy, Science, Language, Time
44 points by mitchbob 71 days ago | 9 comments
UK sleep experts say it's time to kill daylight saving for good (theregister.com)
The streets of Soho aren't alive with disco or bellbottoms anymore, so maybe it's time to ditch another '70s icon we should have outgrown by now, says the British Sleep Society (BSS).
Time, Health, United Kingdom, Daylight Saving
28 points by DamonHD 83 days ago | 28 comments
Sinusoidal Sunlight (leancrew.com)
I started my morning walk earlier than usual today, and it was still fairly dark out. I thought about this post from last year and the Daylight line in the graph:
Photography, Daylight, Time
100 points by surprisetalk 86 days ago | 33 comments
Time is a dimension, but not like space (bigthink.com)
The fabric of spacetime is four-dimensional, with three for space and only one for time. But wow, time sure is different from space!
Physics, Time, Space, Dimension
173 points by belter 93 days ago | 198 comments
Puzzle took me three years and required thinking in 3721 dimensions [video] (youtube.com)
Puzzles, Mathematics, Video, Time
18 points by f1shy 98 days ago | 0 comments
On the Nature of Time (stephenwolfram.com)
Time is a central feature of human experience. But what actually is it? In traditional scientific accounts it’s often represented as some kind of coordinate much like space (though a coordinate that for some reason is always systematically increasing for us). But while this may be a useful mathematical description, it’s not telling us anything about what time in a sense “intrinsically is”.
Time, Physics, Philosophy, Science
361 points by iamwil 101 days ago | 262 comments
Evidence of 'Negative Time' Found in Quantum Physics Experiment (scientificamerican.com)
Time can take on negative values in the quantum realm.
Quantum Physics, Time, Science
18 points by zonovar 109 days ago | 2 comments
The perils of transition to 64-bit time_t (gentoo.org)
As 2038 is approaching, 32-bit applications exercising 32-bit time_t are up to stop working.
Software, Programming, Security, Time, 2038 Problem
299 points by todsacerdoti 112 days ago | 225 comments
Show HN: Cronexpr, a Rust library to parse and iter crontab expression (docs.rs)
cronexpr is a library to parse and drive the crontab expression.
Rust, Libraries, Cron, Scheduling, Time
160 points by tison 114 days ago | 32 comments
A web site dedicated to precise Time and Frequency (leapsecond.com)
Twenty five years ago I wanted to build a LED digital analog clock that would be accurate to better than one second per year -- so I would have the fun of adjusting it when a leap second occurred.
Time, Clocks, Leap Seconds, Technology
11 points by gballan 122 days ago | 1 comments
What Is an Atomic Clock? (2019) (nasa.gov)
Atomic Clocks, Science, Time
18 points by dinoqqq 135 days ago | 0 comments
State and time are the same thing (buttondown.com)
Time, Philosophy
63 points by BerislavLopac 143 days ago | 44 comments
Parochialism in time and space (2021) (wyclif.substack.com)
Philosophy, Time, Space
36 points by Bluestein 146 days ago | 45 comments
JavaScript dates are about to be fixed (timetime.in)
JavaScript, Programming, Time, Software Updates
413 points by thunderbong 147 days ago | 277 comments