6 ms·

> India has half-hour timezones If that's messy, consider Nepal's timezone that's on the 45-minute mark (UTC+5:45).

by plibither8 3y ago

hprotagonist 3y ago
or one island of new zealand (chatham), which is +12:45
- slyall 3y ago
  The Chatham Islands are an Island group, two of which are inhabited (Chatham Island and Pitt Island). https://en.wikipedia.org/wiki/Chatham_Islands https://en.wikipedia.org/wiki/Chatham_Islands Right now is it on +13:45 due to Daylight Saving https://en.wikipedia.org/wiki/Chatham_Standard_Time_Zone https://en.wikipedia.org/wiki/Chatham_Standard_Time_Zone
- scheme271 3y ago
  Nepal is UTC+5:45. I think that's the largest population on a 15/45 minute offset.
  - physicles 3y ago
    Fun fact: there are currently no time zones with 15 minute offsets.
    - iso8859-1 3y ago
      Why does Nepal not count as one?
- angrygoat 3y ago
  or along the highway near the Western Australia/South Australia border, which informally uses +8:45 https://en.wikipedia.org/wiki/UTC%2B08:45 https://en.wikipedia.org/wiki/UTC%2B08:45
  - qwertox 3y ago
    Same for Nepal, UTC+05:45 https://en.wikipedia.org/wiki/List_of_UTC_offsets https://en.wikipedia.org/wiki/List_of_UTC_offsets
- Izkata 3y ago
  RealLifeLore just had a video about time zones in that area of the world, there's an area between New Zealand and Hawaii where you can go north/south and jump an entire day.
PartiallyTyped 3y ago
Why is humanity like this?
- bandrami 3y ago
  In this case it was so the Sun would be roughly due south at noon in Delhi
  - djbusby 3y ago
    Doesn't that depend on the day of year too?
    - bandrami 3y ago
      That far south it only varies by a couple of degrees. It does wreak astronomical havoc in Mumbai, though, where the Sun will sometimes be way in the northeast at noon.
- hn72774 3y ago
  It's mostly political. There isn't a perfect geographical width for time zones. So humans pick something to define the boundaries between time zones. And making boundaries on a map is political.
  - JJMcJ 3y ago
    To some extent a compromise between solar time and political and economic realities. For example, the Eastern Time Zone in the USA stretches almost to 90 degrees West, reflecting the East Coast's powerful pull on that part of the country.
    - dron57 3y ago
      The worst case is all of China being in the same time zone. It's quite crazy. China has about the same land area as the US.
poink 3y ago
Last startup I worked for hired a Nepal-based QA person. There was a bunch of calendaring and daily/weekly charts in the apps, and she found bugs in _everything_. I make sure to test with Nepal time whenever I'm testing date/time stuff now.
- midasuni 3y ago
  When I built a live clock for some new CasparCG based graphics for a major TV program out of singapore some years back, a colleague reviewing it in London tried to trick it with a Nepal offset — apparently they’d run into an issue with the Viz system they used in 2015 when there were a lot of lives from Nepal. Obviously it worked fine, as did Chatham Island.
- iso8859-1 3y ago
  Even better, use Monrovia in the 70s. They had an offset of 44m30s.[0] >>> datetime(1972,1,1,tzinfo=ZoneInfo('Africa/Monrovia')).isoformat() '1972-01-01T00:00:00-00:44:30' [0]: https://en.wikipedia.org/wiki/Time_in_Liberia#History https://en.wikipedia.org/wiki/Time_in_Liberia#History
- lb1lf 3y ago
  And, of course, there's the (hopefully apocryphal) story of the French initially referring to GMT as 'Paris time minus nine minutes and twenty-one seconds'.
  - LegionMammal978 3y ago
    As it happens, this story isn't apocryphal at all! One can readily find the original law, which was enacted on March 9, 1911, and published in the Journal officiel of March 10, 1911 [0]: > Article unique. — L'heure légale en France et en Algérie est l'heure, temps moyen de Paris, retardée de neuf minutes vingt et une secondes. The decree which finally replaced it was made on August 9, 1978, and published on August 19, 1978 [1]: > Art. 2. — Sur l'ensemble du territoire de la République française, le temps légal (ou heure légale) est défini à partir du temps universel coordonné (UTC) établi par le bureau international de l'heure. [0] https://gallica.bnf.fr/ark:/12148/bpt6k2022333z/f2.item https://gallica.bnf.fr/ark:/12148/bpt6k2022333z/f2.item [1] https://www.legifrance.gouv.fr/jorf/id/JORFTEXT000000880128 https://www.legifrance.gouv.fr/jorf/id/JORFTEXT000000880128
foolswisdom 3y ago
And don't forget about https://www.zainrizvi.io/blog/falsehoods-programmers-believe-about-time-zones/ https://www.zainrizvi.io/blog/falsehoods-programmers-believe...

> India has half-hour timezones If that's messy, consider Nepal's timezone that's on the 45-minute mark (UTC+5:45).

hprotagonist 3y ago

or one island of new zealand (chatham), which is +12:45

slyall 3y ago
The Chatham Islands are an Island group, two of which are inhabited (Chatham Island and Pitt Island). https://en.wikipedia.org/wiki/Chatham_Islands https://en.wikipedia.org/wiki/Chatham_Islands Right now is it on +13:45 due to Daylight Saving https://en.wikipedia.org/wiki/Chatham_Standard_Time_Zone https://en.wikipedia.org/wiki/Chatham_Standard_Time_Zone
scheme271 3y ago
Nepal is UTC+5:45. I think that's the largest population on a 15/45 minute offset.
- physicles 3y ago
  Fun fact: there are currently no time zones with 15 minute offsets.
  - iso8859-1 3y ago
    Why does Nepal not count as one?
angrygoat 3y ago
or along the highway near the Western Australia/South Australia border, which informally uses +8:45 https://en.wikipedia.org/wiki/UTC%2B08:45 https://en.wikipedia.org/wiki/UTC%2B08:45
- qwertox 3y ago
  Same for Nepal, UTC+05:45 https://en.wikipedia.org/wiki/List_of_UTC_offsets https://en.wikipedia.org/wiki/List_of_UTC_offsets
Izkata 3y ago
RealLifeLore just had a video about time zones in that area of the world, there's an area between New Zealand and Hawaii where you can go north/south and jump an entire day.

PartiallyTyped 3y ago

Why is humanity like this?

bandrami 3y ago
In this case it was so the Sun would be roughly due south at noon in Delhi
- djbusby 3y ago
  Doesn't that depend on the day of year too?
  - bandrami 3y ago
    That far south it only varies by a couple of degrees. It does wreak astronomical havoc in Mumbai, though, where the Sun will sometimes be way in the northeast at noon.
hn72774 3y ago
It's mostly political. There isn't a perfect geographical width for time zones. So humans pick something to define the boundaries between time zones. And making boundaries on a map is political.
- JJMcJ 3y ago
  To some extent a compromise between solar time and political and economic realities. For example, the Eastern Time Zone in the USA stretches almost to 90 degrees West, reflecting the East Coast's powerful pull on that part of the country.
  - dron57 3y ago
    The worst case is all of China being in the same time zone. It's quite crazy. China has about the same land area as the US.

poink 3y ago

Last startup I worked for hired a Nepal-based QA person. There was a bunch of calendaring and daily/weekly charts in the apps, and she found bugs in _everything_. I make sure to test with Nepal time whenever I'm testing date/time stuff now.

midasuni 3y ago
When I built a live clock for some new CasparCG based graphics for a major TV program out of singapore some years back, a colleague reviewing it in London tried to trick it with a Nepal offset — apparently they’d run into an issue with the Viz system they used in 2015 when there were a lot of lives from Nepal. Obviously it worked fine, as did Chatham Island.
iso8859-1 3y ago
Even better, use Monrovia in the 70s. They had an offset of 44m30s.[0] >>> datetime(1972,1,1,tzinfo=ZoneInfo('Africa/Monrovia')).isoformat() '1972-01-01T00:00:00-00:44:30' [0]: https://en.wikipedia.org/wiki/Time_in_Liberia#History https://en.wikipedia.org/wiki/Time_in_Liberia#History
lb1lf 3y ago
And, of course, there's the (hopefully apocryphal) story of the French initially referring to GMT as 'Paris time minus nine minutes and twenty-one seconds'.
- LegionMammal978 3y ago
  As it happens, this story isn't apocryphal at all! One can readily find the original law, which was enacted on March 9, 1911, and published in the Journal officiel of March 10, 1911 [0]: > Article unique. — L'heure légale en France et en Algérie est l'heure, temps moyen de Paris, retardée de neuf minutes vingt et une secondes. The decree which finally replaced it was made on August 9, 1978, and published on August 19, 1978 [1]: > Art. 2. — Sur l'ensemble du territoire de la République française, le temps légal (ou heure légale) est défini à partir du temps universel coordonné (UTC) établi par le bureau international de l'heure. [0] https://gallica.bnf.fr/ark:/12148/bpt6k2022333z/f2.item https://gallica.bnf.fr/ark:/12148/bpt6k2022333z/f2.item [1] https://www.legifrance.gouv.fr/jorf/id/JORFTEXT000000880128 https://www.legifrance.gouv.fr/jorf/id/JORFTEXT000000880128

foolswisdom 3y ago

And don't forget about https://www.zainrizvi.io/blog/falsehoods-programmers-believe-about-time-zones/ https://www.zainrizvi.io/blog/falsehoods-programmers-believe...