Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
Time is a Social Construct
Search
Daniel Cousineau
August 14, 2019
Programming
1
360
Time is a Social Construct
Given at BrooklynJS, ManhattanJS, and JSConf 2019
https://www.youtube.com/watch?v=EUzPpXhFmG8
Daniel Cousineau
August 14, 2019
Tweet
Share
More Decks by Daniel Cousineau
See All by Daniel Cousineau
React @ Scale
dcousineau
0
93
Frontend Performance & You
dcousineau
0
170
Feature Flags & You
dcousineau
2
74
React+Redux @ Scale
dcousineau
1
300
Reframing The Problem - DCJS July 2016
dcousineau
0
100
YAFT
dcousineau
2
130
Queues and the beanstalkd
dcousineau
1
560
How Not Writing PHP Makes You Better At PHP
dcousineau
0
350
JavaScript for PHP Developers
dcousineau
4
560
Other Decks in Programming
See All in Programming
「コンパイル時のユニットテスト」導入するとユニットテストを 書かなくてよくなるのか?
tomohisa
9
2.2k
Kotlinを用いたDSL的な設計手法と使用上の注意
kohii00
3
530
PHP8の機能を使って堅牢にコードを書く
fendo181
6
2.6k
決断するための勇気、そのためのBacklog / Courage to make decisions, Backlog for that.
seike460
PRO
4
1.9k
WasmOS: Wasmを実行する自作Microkernel
riru
0
370
ここ1~2年くらいで 使えるようになった(主要ブラウザーの最新版 がすべて対応した ) ウェブの新機能について ランダムに喋る!
myzkyy
9
6.5k
PHPでOfficeファイルを取り扱う! PHP Officeライブラリを プロダクトに組み込んだ話
hirobe1999
0
840
C# 大統一理論推進委員会 会員のための Unity Package Manager プロジェクト構成案
monry
PRO
0
580
Dockerで始めるAWS Lambda開発
stutkhd0709
14
2.5k
MySQL のインデックスの種類をおさらいしよう! / overviewing indexes in MySQL
okashoi
0
170
Enhancing Applications with Accessibility API
kishikawakatsumi
3
1k
オブジェクト指向は必要なのか / Is object-oriented needed?
kishida
27
19k
Featured
See All Featured
Rebuilding a faster, lazier Slack
samanthasiow
72
8.2k
Documentation Writing (for coders)
carmenintech
59
3.8k
Building a Modern Day E-commerce SEO Strategy
aleyda
15
6.3k
Bash Introduction
62gerente
604
210k
Thoughts on Productivity
jonyablonski
57
3.8k
Making Projects Easy
brettharned
106
5.4k
The MySQL Ecosystem @ GitHub 2015
samlambert
242
12k
VelocityConf: Rendering Performance Case Studies
addyosmani
319
23k
実際に使うSQLの書き方 徹底解説 / pgcon21j-tutorial
soudai
111
35k
Intergalactic Javascript Robots from Outer Space
tanoku
266
26k
Building Your Own Lightsaber
phodgson
97
5.6k
Cheating the UX When There Is Nothing More to Optimize - PixelPioneers
stephaniewalter
272
12k
Transcript
@dcousineau TIME IS A SOCIAL CONSTRUCT
@dcousineau SOCIAL CONSTRUCTS ARE GARBAGE
@dcousineau TIME IS GARBAGE
@dcousineau @dcousineau IS GARBAGE he/him
@dcousineau
@dcousineau
@dcousineau
@dcousineau
@dcousineau
@dcousineau
@dcousineau @dcousineau
@dcousineau 12pm Aug 15th, 2019
@dcousineau @dcousineau
@dcousineau @dcousineau
@dcousineau @dcousineau
@dcousineau @dcousineau
@dcousineau @dcousineau
@dcousineau @dcousineau
@dcousineau @dcousineau
@dcousineau @dcousineau
@dcousineau
@dcousineau @dcousineau
@dcousineau @dcousineau
@dcousineau @dcousineau
@dcousineau 12pm Aug 15th, 2019 UTC-0400
@dcousineau
@dcousineau 2019-08-15T12:00:00-0400
@dcousineau
@dcousineau
@dcousineau
@dcousineau
@dcousineau
@dcousineau
@dcousineau @dcousineau
@dcousineau
@dcousineau 2019-08-15T16:00:00Z
@dcousineau @dcousineau
@dcousineau @dcousineau
@dcousineau Daylight Savings Time @dcousineau
@dcousineau Sun, Mar 10 @ 2am to Sun, Nov 3
@ 2am
@dcousineau 2019-08-15T16:00:00Z 2019-11-04T16:00:00Z 12pm in New York 11am in New
York
@dcousineau
@dcousineau
@dcousineau Arizona is in the Mountain Timezone and does not
observe daylight savings time except in the Navajo Indian Nation.
@dcousineau
@dcousineau Standard DST
@dcousineau 2019-03-10T02:01:00-07:00 “Fun” Fact Quiz
@dcousineau 2019-03-10T02:01:00-07:00 “Fun” Fact Quiz
@dcousineau
@dcousineau @dcousineau
@dcousineau
@dcousineau @dcousineau
@dcousineau
@dcousineau @dcousineau
@dcousineau
@dcousineau
@dcousineau America/New_York EST America/Chicago CST America/Denver MST America/Phoenix MST …
@dcousineau America/Indiana/Indianapolis America/Indiana/Knox America/Indiana/Marengo America/Indiana/Petersburg America/Indiana/Tell_City America/Indiana/Vevay America/Indiana/Vincennes America/Indiana/Winamac
@dcousineau Maybe Wikipedia can help…
@dcousineau
@dcousineau
@dcousineau 1918–1961
@dcousineau 1961–1967
@dcousineau 1967–1977
@dcousineau 1977–1991
@dcousineau 1991–2006
@dcousineau 2006–March 2007
@dcousineau March 2007–November 2007
@dcousineau November 2007–Today
@dcousineau America/New_York: Dearborn & Ohio America/Chicago: Jasper, Lake, LaPorte, Newton,
Porter, Gibson, Posey, Spencer, Vanderburgh, & Warrick America/Kentucky/Louisville: Clark, Floyd, & Harrison Counties in Indiana NOT on America/Indiana/*
@dcousineau 2019-08-15T12:00:00-0400 America/New_York
@dcousineau
@dcousineau So… did we learn anything?
@dcousineau Treat time as if it is irreducibly complex.
@dcousineau Time is a question of where almost as much
as it’s when.
@dcousineau Treat UTC like it’s merely a synchronization and conversion
aid.
@dcousineau Always preserve presented offsets / timezones. Only clone &
convert into UTC if storage requires.
@dcousineau Use ISO-8601 in transit & let the browser handle
the rest. Treat it like a11y, give the browser / user control.
@dcousineau Be explicit about context with your user. If this
is confusing for you, it’s worse for them.
@dcousineau USE A LIBRARY! Especially for simple arithmetic. date-fns, moment.js,
Luxon
@dcousineau When all else fails, just move to Florida. ☀
@dcousineau fin.