This is a linked open data (LOD) about date and time. "C.E. 1787 March 26" is a date of Julian/Gregorian Calendar (reformed in 1752) (Calendar ID: 101.2).
http://datetime.hutime.org/calendar/101.2/date/C.E._1787_March_26
hcal:101.2/date/2373832.5
hcal:101.2/date/C.E._1787_March_26
hcaldate:2373832.5
hcaldate:C.E._1787_March_26