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https://github.com/oz/tz

🌐 A time zone helper
https://github.com/oz/tz

timezone tzdata zone-helper

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🌐 A time zone helper

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# 🌐 A time zone helper



tz helps you schedule things across time zones. It's an interactive TUI

program that displays time across the time zones of your choosing.



# Usage



Run `tz` with no arguments to show the local time, as well as the UTC

time zone. It gets more useful when you pass some time zones to the

program, to list those below the local time zone.



For now, you need to select the time zones from the [tz_data][tzdata]

list. Yes, there are plans to make this friendlier for humans too.

You're welcome to file an issue about it. I enjoy reading those.



If you would rather not type the list everytime, you could set an alias

for your shell, or use the `TZ_LIST` environment variable with a

semi-colon separated list of [tz data][tzdata] zone names, or use a

configuration file (see *Configuration* below).



Check out `tz -h` for other flags.










The program will adjust to light and dark terminals themes.



[tzdata]: https://en.wikipedia.org/wiki/List_of_tz_database_time_zones



# Installing



I provide linux/amd64 builds for "official" releases, and you can build

from source for your favorite architecture. Kind souls have also

packaged the program for other OSes.



## Packages



### Brew



Brew has a tz package: `brew install tz`



### Archlinux



If you're an Archlinux user, packages are also available:



  - [tz][tz-arch] follows releases and,

  - [tz-git][tz-arch-git] builds the `main` git branch.



[tz-arch]: https://aur.archlinux.org/packages/tz

[tz-arch-git]: https://aur.archlinux.org/packages/tz-git



### Go

```

go install github.com/oz/tz@latest

```



# Configuration



The tz program uses standard time zones as described

[here](https://en.wikipedia.org/wiki/List_of_tz_database_time_zones).



You can specify preferences through a configuration file, an environment variable,

or as command arguments.



They are applied in this order, overriding at each subsequent step:



1. Configuration file `~/.config/tz/conf.toml`

2. Environment variable `TZ_LIST`

3. Command line arguments `tz UTC`



The local time zone is always displayed first.



## Configuration File



Configs are read from `$HOME/.config/tz/conf.toml`.



Time zone `id`s should reference items from the standard tz database names.

Alias them by providing your own name with the `name` key.



Sample configuration: [example-conf.toml](./example-conf.toml)



## Environment Variable



This method only supports setting time zones. Keymaps must be configured through

the configuration file.



Specify time zones to display by setting the `TZ_LIST` environment variable. For

example, to display your local time, the time in California, and the time Paris,

set `TZ_LIST` to `US/Pacific;Europe/Paris`.



The `TZ_LIST` environment variable recognizes items from the standard tz

database names, but you can alias these, using a special value: use the

standard name followed by `,` and your alias. For example:



```bash

TZ_LIST="Europe/Paris,EMEA office;US/Central,US office"

```



If adding this to a shell configuration, remember to export it:



```bash

export TZ_LIST="Europe/Paris,EMEA office;US/Central,US office"

```



# Building



You need a recent-ish release of go with modules support:



```bash

git clone https://github.com/oz/tz

cd tz

go build

```



# Testing



```bash

go test -cover

```



# Debug



```bash

DEBUG=1 tz # Logs will write to debug.log

```



# Contributing



Please do file bugs, and feature requests.  I am accepting patches too,

those are the best, but please, open an issue first to discuss your

changes. 😄



# License



The GPL3 license.



Copyright (c) 2021-2022 Arnaud Berthomier