[HN Gopher] Tz: A Time Zone Helper
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Tz: A Time Zone Helper
Author : polm23
Score : 101 points
Date : 2021-03-22 06:48 UTC (1 days ago)
(HTM) web link (github.com)
(TXT) w3m dump (github.com)
| tantalor wrote:
| Is the diagonal white/black separator in the example supposed to
| indicate something? It appears to suggest something like "night"
| towards the right, and it lines up with the numbers, but the
| numbers on either side of it are different, ranging from
| 10am/11am to 9pm/10pm.
|
| Edit: Oh! Is it just showing how the UI appears in dark mode?
| Then the diagonal is meaningless and distracting!
| curben wrote:
| The diagonal combines light and dark themes' screenshot.
|
| Light: https://postimg.cc/BPW3vwJN
|
| Dark: https://postimg.cc/dkZvwKcL
| njt wrote:
| I wrote a similar tool based on the idea of choosing cities and
| "shifting" the time: https://zeitzono.org/
| SamBorick wrote:
| For a similar experience on the web I highly recommend
| https://everytimezone.com/
| Zenst wrote:
| I see they handle Daylight saving, albeit they flag that entire
| week as the change from what I can see for the UK which has a
| change from GMT to BST (which they call UST+1) on the 28th -
| yet whole week gets labelled that in which it changes.
|
| Personally I'll be glad when we do away with such daylight
| saving TZ changes.
| globular-toast wrote:
| It doesn't seem to handle DST properly at all. If I set the
| date to the 27th, it shows London on the 28th being GMT, if I
| set it to the 28th it shows London on the 27th being BST.
| Both wrong. It should instead show the 28th as being only a
| 23 hour day and the 31st October being a 25 hour day.
| loloquwowndueo wrote:
| Very neat!
|
| I normally use
| https://www.timeanddate.com/worldclock/meeting.html which has
| similar functionality but something that works in the command
| line definitely sounds interesting. I might give it a go (pun
| intended haha)
| geocrasher wrote:
| This is very neat! I can use this at work where I talk to people
| from all over the world on a regular basis. Will it displace
| https://worldtimebuddy.com/ in my workflow? I don't know, but
| it'll be fun to find out.
|
| Not being one of the Cool Kids who has a golang environment ready
| to go, I logged into my trusty CentOS 7 box and installed golang
| with "yum install go" which went fine. I cloned the rep and
| attempted to build:
|
| git clone https://github.com/oz/tz
|
| cd tz
|
| go build
|
| Nothing. Nada. Dead. Not even an error.
|
| Some googling[1] led me to 'go list -x' to list the modules,
| which was failing. I suspected failed IPv6 resolution (an issue
| on this box) so some more googling[2] led me to add this in
| /etc/gai.conf:
|
| precedence ::ffff:0:0/96 100
|
| This solved the problem with IPv6 hanging up, as IPv4 is now the
| preference. Neat. Now, it still failed with another error:
| invalid pseudo-version
|
| This appeared to be due to an older version of git, so I
| installed a newer version, again after some googling[3]:
|
| yum -y erase git
|
| yum -y install https://repo.ius.io/ius-release-el7.rpm
|
| yum -y install git222
|
| I also had to reinstall golang with 'yum install go' and now I am
| rewarded with a completed 'go build'. Neat! I am looking forward
| to checking this little program out.
|
| [1] https://github.com/golang/go/issues/16104 [2]
| https://stackoverflow.com/a/21672312 [3]
| https://github.com/golang/go/issues/38373#issuecomment-70187...
| svieira wrote:
| Your travails reminds me of Joe Armstrong's talk _The Mess
| We're In_ where he talks about the pains he had getting his
| slides for the talk ready:
|
| https://www.youtube.com/watch?v=lKXe3HUG2l4
| Geezus_42 wrote:
| Same issue on Ubuntu but using "go get" worked although I have
| no idea where the config file the developer mentions is.
|
| Comment to dev: Please provide better documentation.
| Installation steps and configuration are terribly lacking.
| ydant wrote:
| Seconding the recommendation for https://worldtimebuddy.com -
| it's a really simple thing it does, but it's somehow the only
| site/tool I've found that clearly displays the timezones in a
| way that's easy to understand, including the cross-day issues.
| It helped a lot for me scheduling meetings between both coasts
| of the US, India, and Australia.
|
| It looks like this tool does a similar kind of display, so
| definitely worth giving a shot.
|
| As for this command, I already had go installed on MacOS
| through homebrew (although I rarely use it in any form) - and
| the build went fine and the command runs as expected.
| geocrasher wrote:
| One thing I like about woldtimebuddy.com is that you can
| share the link with others so that everyone is clear on
| scheduling. The one that always gets me is India, as they're
| an additional half hour ahead.
| mywacaday wrote:
| the copy the time window you've selected from
| worldtimebuddy to plain text is nice as well
| ydant wrote:
| Agreed. It's also concise and easy to screenshot. This CLI
| tool is less so.
| twic wrote:
| > I logged into my trusty CentOS 7 box and installed golang
| with "yum install go"
|
| Ah well there's your problem!
|
| I'm always nervous about installing language toolchains from
| the standard repositories on CentOS, because they are often
| very out of date, or intertwined with the rest of the base
| system in awkward ways (this is more of a gcc concern perhaps).
| I have no idea what the state of Go on CentOS is, so this could
| be baseless nervousness in this case.
|
| If there is a software collection for a toolchain, that may be
| a better bet than whatever is in the main repo. There is one
| for Go:
|
| https://www.softwarecollections.org/en/scls/rhscl/go-toolset...
|
| I can't work out what's in it, so i have no idea if it would
| have made life any easier around your networking or Git issues.
| I can't even tell what version of Go is in it. The fact that
| there isn't a Go toolset for CentOS 8 hints that it might be
| quite out of date.
| geocrasher wrote:
| Indeed this is definitely the wrong flavor of Linux for
| anything cutting edge. Which happens to be why I love it so
| much ;)
| throw0101a wrote:
| > _Will it displacehttps://worldtimebuddy.com/ in my workflow?_
|
| That site is a bit too sparse for my liking. I find the
| following to have a decent landing page:
|
| * https://everytimezone.com
| gkfasdfasdf wrote:
| FYI I was able to install using homebrew go (go 1.16.2):
| go get github.com/oz/tz
|
| And it put the tz executable in ~/go/bin
|
| Kinda surprised the readme didn't mention it. Is this not the
| preferred way to install go CLI tools now with 1.16+ ?
| globular-toast wrote:
| > The program will adjust to light and dark terminals themes.
|
| Instead of doing this you should use named colours. "Green" in my
| terminal is definitely the correct green for my terminal theme.
| chrismorgan wrote:
| Look, you and I may have sane ANSI 16 colours, but it'll be a
| very significant fraction of people that don't (and almost no
| one will customise the next 240 colours). Remember things like
| that there's a distressingly high chance that blue is almost
| invisible against black, and even _bright_ blue's contrast is
| commonly much too low--to say nothing of the limited palette
| range.
|
| But what this program is doing is using termenv's
| HasDarkBackground function to decide whether the terminal is
| light or dark, and is then specifying RGB colours. It'll try to
| guess whether to use 16 colours, 256 colours or 24-bit colour
| and do some kind of mapping down if necessary (which I bet this
| app makes a _total_ hash of, probably not having chosen the
| colours carefully). But the way it figures out the terminal's
| background colour... ugh. _Some_ terminals will support it, but
| for many it'll fail and just assume black. Looks like on unix
| you could set an environment variable COLORFGBG to override
| this, https://github.com/muesli/termenv/blob/6bb55115565c27f4cc
| 681..., but if you're on Windows, tough luck, apparently you're
| not allowed to have a light terminal (which you can get in
| Command Prompt by running `color f0`): https://github.com/muesl
| i/termenv/blob/537e36cb0472a69a3c828....
|
| The simple fact of the matter is that there are no particularly
| good solutions for handling colour in terminals if you want the
| colours to cohere and naturally map to real-world colour
| understanding, which is what something like this would _prefer_
| to be able to do. Things are just barely OK if you just want
| colours with no inherent semantics.
|
| So... yeah, might be nice if they used the 16 colours, but I
| can readily understand them not doing so, and if they _did_ do
| so, although it'd make it better for some, it'd make it worse
| for others. Where does the balance lie? I dunno.
| muskox2 wrote:
| I think the best thing to do is use the first 16 named colors
| and give users the option to disable colors if they want.
| This supports most use-cases.
| TeMPOraL wrote:
| The best way would be if the software just outputted
| objects instead of text, and let the user style them for
| display in any way they want :).
| zamadatix wrote:
| Agree for raw "syntax highlighting" styling output, disagree
| for styling the output such as here where the gradient
| represents additional information/context. Especially since it
| takes the terminal background configuration into consideration
| when making that choice.
| siraben wrote:
| I just packaged it in my overlay so Nix users can try it out
| without installing it (works on macOS and Linux)
| nix run github:siraben/siraben-overlay#tz
|
| or, when it gets upstreamed into Nixpkgs nix run
| nixpkgs#tz
|
| Seems like a useful thing to have so you can visually see when
| multiple time zones have overlapping daylight! Neat!
| dnrvs wrote:
| Looks great! A few years ago I built basically the same thing as
| a simple web app: https://tz.now.sh/
| speakspokespok wrote:
| Worldtimebuddy is great but if you're looking for something even
| better, on Mac you cannot beat 'The Clock' app. Exact same
| functionality as Worldtimebuddy but goes farther and allows
| renaming those clocks. If Dan is on EST and Jules is on NRT,
| rename the EST clock to Dan and the NRT clock to Jules and slide
| back and forth to easily do the timezone math.
|
| If you work for a cloud company and need to schedule cross AZ
| work this little app will save your life. What is local time in
| IAD when SYD is doing 10PM maintenance local time? What about
| NRT? :-)
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(page generated 2021-03-23 23:01 UTC)