This is a linked open data (LOD) about date and time. "29/03/1446" is a date of Hijri Calendar-TEST (Calendar ID: 9103.1).
http://datetime.hutime.org/calendar/9103.1/date/29/03/1446
hcal:9103.1/date/2460586.5
hcal:9103.1/date/29/03/1446
hcaldate:2460586.5
hcaldate:29/03/1446