This is a linked open data (LOD) about date and time. "29 טבת 5785" is a date of Hebrew Calendar-TEST (Calendar ID: 104.1).
http://datetime.hutime.org/calendar/104.1/date/29_טבת_5785
hcal:104.1/date/2460704.5
hcal:104.1/date/29_טבת_5785
hcaldate:2460704.5
hcaldate:29_טבת_5785