This is a linked open data (LOD) about date and time. "01 תשרי 5345" is a date of Hebrew Calendar-TEST (Calendar ID: 104.1).
http://datetime.hutime.org/calendar/104.1/date/01_תשרי_5345
hcal:104.1/date/2299852.5
hcal:104.1/date/01_תשרי_5345
hcaldate:2299852.5
hcaldate:01_תשרי_5345