2.1.4 [ECMA-402/5:2018] Section 12.1.5 DateTime Format Functions

V0123: Old dates are not formatted correctly

The specification states:

 12.1.5 DateTime Format Functions
     A DateTime format function is an anonymous built-in function ...
     When a DateTime format function is called with optional argument date, the following 
     steps are taken:
         5. Return FormatDateTime(dtf, x).

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Old dates are not formatted correctly; for example, June 1 BC.