<?php

namespace App\Support;

use Carbon\CarbonInterface;

/** 业务展示时间统一按北京时间输出。 */
final class BizDateTime
{
    public const TIMEZONE = 'Asia/Shanghai';

    public static function toIso8601(?CarbonInterface $dt): ?string
    {
        return $dt?->copy()->timezone(self::TIMEZONE)->toIso8601String();
    }
}