@php
    $currentTz = $timezoneValue ?? (isset($tenant) && $tenant ? ($tenant->timezone ?? null) : null);
@endphp
<select name="timezone" class="{{ $selectClass ?? 'form-select form-select-sm' }}" title="IANA timezone" @isset($selectId) id="{{ $selectId }}" @endisset>
    <option value="__default__" @selected(empty($currentTz))>
        Application default ({{ config('app.timezone') }})
    </option>
    @foreach($timezoneGroups as $region => $zones)
        <optgroup label="{{ $region }}">
            @foreach($zones as $identifier => $label)
                <option value="{{ $identifier }}" @selected($currentTz === $identifier)>
                    {{ $label }} — {{ $identifier }}
                </option>
            @endforeach
        </optgroup>
    @endforeach
</select>