The calendar date for is 12:0:0.00 UT on -2, -4712 .

Some different formats for your copying and pasting pleasure:

 -1.5 -4712
-4712-0--2 12:0:0.00     year-month-day hour:minute:second
-2/0/-4712               day/month/year
0/-2/-4712               month/day/year
-2-0--4712               day-month-year
0--2--4712               month-day-year
-2/0/-4712/12/0/0.00      day/month/year/hour/minute/second
  -2/0/-4712
  0/-2/-4712
  -2-0--4712
  0--2--4712

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