This is a linked open data (LOD) about date and time. "28 שבט 5471" is a date of Hebrew Calendar-TEST (Calendar ID: 104.1).
http://datetime.hutime.org/calendar/104.1/date/28_שבט_5471
hcal:104.1/date/2346036.5
hcal:104.1/date/28_שבט_5471
hcaldate:2346036.5
hcaldate:28_שבט_5471