datetime.php

См. документацию.

<?php
 
namespace Bitrix\Bizproc\BaseType\Value;
 
use Bitrix\Main;
 
class DateTime extends Date
{
    public function __construct($dateFormatted = null, $offset = 0)
    {
        $offset = (int) $offset;
 
        if ($dateFormatted === null)
        {
            $this->timestamp = time();
        }
        elseif (is_numeric($dateFormatted))
        {
            $this->timestamp = (int) $dateFormatted;
        }
        else
        {
            if (preg_match(static::SERIALIZED_PATTERN, $dateFormatted, $matches))
            {
                $dateFormatted = $matches[1];
                $offset = (int) $matches[2];
            }
 
            try
            {
                $datetime = new Main\Type\DateTime($dateFormatted);
                $this->checkYear($datetime);
 
                $this->timestamp = $datetime->getTimestamp() - $offset;
            }
            catch (Main\ObjectException $exception)
            {
                try
                {
                    $this->timestamp = (new Main\Type\DateTime($dateFormatted, DATE_ISO8601))->getTimestamp() - $offset;
                }
                catch (Main\ObjectException $exception)
                {
                    $this->timestamp = null;
                }
            }
        }
 
        $this->offset = $offset;
    }
 
    public function toSystemObject()
    {
        return Main\Type\DateTime::createFromTimestamp($this->getTimestamp());
    }
 
    public function getFormat()
    {
        return Main\Type\DateTime::getFormat();
    }
}