This is a linked open data (LOD) about date and time. "29/05/1442" is a date of Hijri Calendar-TEST (Calendar ID: 9103.2).
http://datetime.hutime.org/calendar/9103.2/date/29/05/1442
hcal:9103.2/date/2459227.5
hcal:9103.2/date/29/05/1442
hcaldate:2459227.5
hcaldate:29/05/1442