2.1.4 [ECMA-402/2] Section 12.3.4 DateTime Format Functions
V0123: Old dates are not formatted correctly
The specification states:
12.3.4 DateTime Format Functions A DateTime format function is an anonymous function that optionally takes an argument date. ... ... When the FormatDateTime abstract operation is called with arguments dateTimeFormat (which must be an object initialized as a DateTimeFormat) and x (which must be a Number value), it returns a String value representing x (interpreted as a time value as specified in ES2015, 188.8.131.52) according to the effective locale and the formatting options of dateTimeFormat.
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Old dates are not formatted correctly; for example, June 1 BC.