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.gitignore

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+/vendor

README.md

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+# Filament Timezone Field
+
+A timezone select field for Laravel Filament.
+
+## Installation
+
+```bash
+composer require tapp/filament-timezone-field
+```
+
+## Usage
+
+Add to your Filament resource:
+
+```php
+use Tapp\FilamentTimezoneField\Forms\Components\TimezoneSelect;
+
+public static function form(Form $form): Form
+{
+    return $form
+        ->schema([
+            // ...
+            TimezoneSelect::make('timezone'),
+            // ...
+        ]);
+}
+```
+
+### Appareance
+
+![Filament Timezone Field](https://raw.githubusercontent.com/TappNetwork/filament-timezone-field/main/docs/filament-timezone-field.png)
+
+### Options
+
+To use GMT instead of UTC (default is UTC), add the `->timezoneType('GMT')` method:
+
+```php
+use Tapp\FilamentTimezoneField\Forms\Components\TimezoneSelect;
+
+public static function form(Form $form): Form
+{
+    return $form
+        ->schema([
+            // ...
+            TimezoneSelect::make('timezone')
+                ->timezoneType('GMT'),
+            // ...
+        ]);
+}
+```
+
+All Filament select field methods are available to use:
+
+```php
+use Tapp\FilamentTimezoneField\Forms\Components\TimezoneSelect;
+
+public static function form(Form $form): Form
+{
+    return $form
+        ->schema([
+            // ...
+            TimezoneSelect::make('timezone')
+                ->searchable()
+                ->required(),
+            // ...
+        ]);
+}
+```

composer.json

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+{
+    "name": "tapp/filament-timezone-field",
+    "description": "Filament timezone field.",
+    "keywords": [
+        "tapp network",
+        "filament",
+        "laravel",
+        "timezone"
+    ],
+    "license": "MIT",
+    "homepage": "https://github.com/TappNetwork/filament-timezone-field",
+    "support": {
+        "issues": "https://github.com/TappNetwork/filament-timezone-field/issues",
+        "source": "https://github.com/TappNetwork/filament-timezone-field"
+    },
+    "require": {
+        "php": "^8.0",
+        "filament/filament": "^2.9"
+    },
+    "autoload": {
+        "psr-4": {
+            "Tapp\\FilamentTimezoneField\\": "src"
+        }
+    },
+    "config": {
+        "sort-packages": true
+    },
+    "minimum-stability": "dev",
+    "prefer-stable": true
+}

src/Forms/Components/TimezoneSelect.php

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+<?php
+
+namespace Tapp\FilamentTimezoneField\Forms\Components;
+
+use DateTimeZone;
+use Filament\Forms\Components\Select;
+
+class TimezoneSelect extends Select
+{
+    protected string $view = 'forms::components.select';
+
+    protected string | null $timezoneType = null;
+
+    protected array $allowedTimezoneTypes = [
+        'UTC',
+        'GMT',
+    ];
+
+    public function getOptions(): array
+    {
+        $options = $this->getTimezones();
+
+        $this->options = $options;
+
+        return $this->options;
+    }
+
+    public function timezoneType(string | null $type): static
+    {
+        $this->timezoneType = strtoupper($type);
+
+        return $this;
+    }
+
+    public function getTimezoneType(): string
+    {
+        if ($this->timezoneType === null && !in_array($this->timezoneType, $this->allowedTimezoneTypes)) {
+            $this->timezoneType = 'UTC';
+        }
+
+        return $this->timezoneType;
+    }
+
+    public function getTimezones(): array
+    {
+        $timezones = DateTimeZone::listIdentifiers(DateTimeZone::ALL);
+
+        $data = [];
+
+        $now = new \DateTime('now', new DateTimeZone($this->getTimezoneType()));
+
+        foreach ($timezones as $timezone) {
+            $offsets[] = $offset = $now->setTimezone(new DateTimeZone($timezone))->getOffset();
+
+            $data[$timezone] = sprintf('(%s) %s', $this->getFormattedOffset($offset), $this->getFormattedTimezoneName($timezone));
+        }
+
+        array_multisort($offsets, $data);
+
+        return $data;
+    }
+
+    protected function getFormattedOffset(string $offset): string
+    {
+        $hours = intval($offset / 3600);
+        $minutes = abs(intval($offset % 3600 / 60));
+
+        return $this->getTimezoneType().($offset ? sprintf('%+03d:%02d', $hours, $minutes) : '');
+    }
+
+    protected function getFormattedTimezoneName(string $name): string
+    {
+        return str_replace(
+            ['/', '_', 'St '],
+            [', ', ' ', 'St. '],
+            $name
+        );
+    }
+}