unixtojd: Unix time stamp to Julian calendar

unixtojd(time_stamp);

$tt=time(); // time stamp of today. 

echo "Time Stamp = $tt ";

$day_jd=unixtojd($tt);

echo "Julian Day by using unixtojd() : $day_jd ";

Time Stamp = 1566139970 

Julian Day by using unixtojd() : 2458714