Time

General

See also Organising#Time management

• https://xkcd.com/1335/
  • https://news.ycombinator.com/item?id=7384025

• http://www.vendian.org/envelope/TemporaryURL/time.html

Time zones

• http://www.iana.org/time-zones

• http://everytimezone.com/

• https://github.com/stub42/pytz/blob/master/tz/NEWS [1]

Calendar

• http://www.timeanddate.com/calendar/?country=9

For accounting: a 5 week month = 5 weeks including a Monday

• http://www.moonstick.com/moonstick.htm [2]

• http://99percentinvisible.org/episode/the-calendar/
  • https://www.reddit.com/r/DIY/comments/3cholo/my_girlfriend_and_i_made_a_pretty_unconventional/

• http://qntm.org/calendar [3]

• Nerdiversary - Is Today a Special Day?

• Calizo - Timeline calendar with zoom - the zoomable timeline calendar!

• Historic Calendars of Europe - generate

• When Can I Reuse This Calendar? - Did you find a 1989 Saved by the Bell calendar in your closet? Are you too cheap to throw out the 2019 calendar you never bothered to open? Now you can party like it's 1964 thanks to WhenCanIReuseThisCalendar.com!

Clocks

• http://www.theguardian.com/science/2015/apr/19/clockmaker-john-harrison-vindicated-250-years-absurd-claims

• http://www.prc68.com/I/timefreq.shtml

• http://www.limmy.com/deedeespeakingclock/

• XTide - Harmonic tide clock and tide predictor

Radio

• WP: WWVB

• http://www.anishathalye.com/2016/12/26/micro-wwvb/ [4]

• https://github.com/hzeller/txtempus - A DCF77, WWVB, JJY and MSF clock LF-band signal transmitter using the Raspberry Pi

to sort

• https://github.com/jarun/pdd - Tiny date, time diff calculator with timers

• http://www.waitbutwhy.com/2013/08/putting-time-in-perspective.html

1h = 3600s 1d = 86400s 1w = 604800s 28d = 2419200s

• http://rsnous.com/posts/2014-08-07-pinhole-a-falling-ball-demo.html

• time cheatsheet

http://jtnimoy.net/workviewer.php?q=178

• http://www.whatsthetimethere.netai.net/msm/

• http://www.fourmilab.ch/documents/calendar/

• http://ilyabirman.net/projects/forebruary/

• https://snipt.net/dogstarchampion/metric-time-indicator-for-ubuntu-unity/

• http://poisson.phc.unipi.it/~maggiolo/index.php/2014/01/how-much-is-time-wrong-around-the-world/

• WP: Runic_calendar

• http://pagancalendar.co.uk/

• http://skreksto.re/products/durr

• http://www.iers.org/nn_10398/IERS/EN/Science/EarthRotation/UT1-TAI.html?__nnn=true

• WP: Decimal_time
• WP: Swatch_Internet_Time [5]

• http://www.visualnews.com/2014/03/17/artist-spent-month-creating-digital-sundial-says-dont-throw-watch/

• https://news.ycombinator.com/item?id=11094274

• https://news.ycombinator.com/item?id=7965317

• http://www.moongiant.com/

• http://procyonic.org/clocks/ [6]

• http://www.famsi.org/research/vanstone/2012/index.html

• http://www.hexahedria.com/experiments/qrclock/index.html

• https://news.ycombinator.com/item?id=12617263
• https://news.ycombinator.com/item?id=12540941

Countdown

• https://github.com/antonmedv/countdown - Terminal countdown timer [7]

Unix epoch

while true; do echo "$(date +%s)" | figlet ; sleep 0.99 ; done

• http://www.epochconverter.com/epoch/clock.php

date -u -d @1400000000
  gives datetime in UTC

NTP

• Network Time Protocol - a protocol designed to synchronize the clocks of computers over a network.
  • WP: Network_Time_Protocol

• LWN.net: A rift in the NTP world - [8]

NTPsec

• Welcome to NTPsec - a secure, hardened, and improved implementation of Network Time Protocol derived from NTP Classic, Dave Mills’s original.
  • https://github.com/ntpsec/ntpsec

• Linux Journal: NTPsec: a Secure, Hardened NTP Implementation - by Eric S. Raymond on March 30, 2017

Linux

• http://man7.org/linux/man-pages/man3/strftime.3.html - time format/template

• dateutils - a bunch of tools that revolve around fiddling with dates and times in the command line with a strong focus on use cases that arise when dealing with large amounts of financial data.