This is a linked open data (LOD) about date and time. "01 אדר 5566" is a date of Hebrew Calendar-TEST (Calendar ID: 104.1).
http://datetime.hutime.org/calendar/104.1/date/01_אדר_5566
hcal:104.1/date/2380736.5
hcal:104.1/date/01_אדר_5566
hcaldate:2380736.5
hcaldate:01_אדר_5566