$jd2 ) { $jd="Invalid date range!"; } else { $jd=" daterange:".intval($jd1)."-".intval($jd2); } } else { $month1=$month2="MM"; $day1=$day2="DD"; $year1=$year2="YYYY"; $jd=""; } ?>
Gregorian Date To Astronomic Julian Numbers Converter (source):
From: Until: