Time is a Social Construct

Given at BrooklynJS, ManhattanJS, and JSConf 2019

https://www.youtube.com/watch?v=EUzPpXhFmG8

1. @dcousineau TIME IS A SOCIAL CONSTRUCT
2. @dcousineau SOCIAL CONSTRUCTS ARE GARBAGE
3. @dcousineau TIME IS GARBAGE
4. @dcousineau @dcousineau IS GARBAGE he/him
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12. @dcousineau 12pm Aug 15th, 2019
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25. @dcousineau 12pm Aug 15th, 2019 UTC-0400
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27. @dcousineau 2019-08-15T12:00:00-0400
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36. @dcousineau 2019-08-15T16:00:00Z
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38. @dcousineau @dcousineau
39. @dcousineau Daylight Savings Time @dcousineau
40. @dcousineau Sun, Mar 10 @ 2am to Sun, Nov 3 @ 2am
41. @dcousineau 2019-08-15T16:00:00Z 2019-11-04T16:00:00Z 12pm in New York 11am in New York
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44. @dcousineau Arizona is in the Mountain Timezone and does not observe daylight savings time except in the Navajo Indian Nation.
45. @dcousineau
46. @dcousineau Standard DST
47. @dcousineau 2019-03-10T02:01:00-07:00 “Fun” Fact Quiz
48. @dcousineau 2019-03-10T02:01:00-07:00 “Fun” Fact Quiz
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57. @dcousineau America/New_York EST America/Chicago CST America/Denver MST America/Phoenix MST …
58. @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
59. @dcousineau Maybe Wikipedia can help…
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62. @dcousineau 1918–1961
63. @dcousineau 1961–1967
64. @dcousineau 1967–1977
65. @dcousineau 1977–1991
66. @dcousineau 1991–2006
67. @dcousineau 2006–March 2007
68. @dcousineau March 2007–November 2007
69. @dcousineau November 2007–Today
70. @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/*
71. @dcousineau 2019-08-15T12:00:00-0400 America/New_York
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73. @dcousineau So… did we learn anything?
74. @dcousineau Treat time as if it is irreducibly complex.
75. @dcousineau Time is a question of where almost as much as it’s when.
76. @dcousineau Treat UTC like it’s merely a synchronization and conversion aid.
77. @dcousineau Always preserve presented offsets / timezones. Only clone & convert into UTC if storage requires.
78. @dcousineau Use ISO-8601 in transit & let the browser handle the rest. Treat it like a11y, give the browser / user control.
79. @dcousineau Be explicit about context with your user. If this is confusing for you, it’s worse for them.
80. @dcousineau USE A LIBRARY! Especially for simple arithmetic. date-fns, moment.js, Luxon
81. @dcousineau When all else fails, just move to Florida. ☀
82. @dcousineau fin.