function rus_date()
{
    $translate = array
    (         
        "Monday" => "Понедельник",
        "Mon" => "Пн",
        "Tuesday" => "Вторник",
        "Tue" => "Вт",
        "Wednesday" => "Среда",
        "Wed" => "Ср",
        "Thursday" => "Четверг",
        "Thu" => "Чт",
        "Friday" => "Пятница",
        "Fri" => "Пт",
        "Saturday" => "Суббота",
        "Sat" => "Сб",
        "Sunday" => "Воскресенье",
        "Sun" => "Вс",
        "January" => "января",    
        "February" => "февраля",    
        "March" => "марта",    
        "April" => "апреля",    
        "May" => "мая",    
        "June" => "июня",    
        "July" => "июля",    
        "August" => "августа",    
        "September" => "сентября",    
        "October" => "октября",    
        "November" => "ноября",    
        "December" => "декабря",    
        "st" => "ое",
        "nd" => "ое",
        "rd" => "е",
        "th" => "ое"
    );
    
    if (func_num_args() > 1)
    {
        $timestamp = func_get_arg(1);
        return strtr(date(func_get_arg(0), $timestamp), $translate);
    }
    else
    {
        return strtr(date(func_get_arg(0)), $translate);
    }
}

echo rus_date('l, j F Y, G:i');