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JavaScript produced an invalid date

RangeError: invalid date

JavaScript encountered an invalid Date value, often when converting or formatting a date that could not be parsed correctly.

RangeError: invalid dateruntime

Observed message

RangeError: invalid date

Why it happens

  • A date string could not be parsed into a valid Date.
  • An invalid timestamp or transformed date value reached formatting code.
  • Locale or format assumptions produced an unusable Date object.

How to fix it

  1. Validate date inputs before constructing or formatting Date objects.
  2. Prefer explicit, standardized date formats rather than ambiguous strings.
  3. Check isNaN(date.getTime()) before calling methods that require a valid date.

Official reference

MDN: RangeError: invalid date

Related errors

ReferenceError: can't access lexical declaration before initializationJavaScript accessed a let or const binding before initializationReferenceError: assignment to undeclared variableJavaScript assigned to an undeclared variableTypeError: class constructors must be invoked with 'new'JavaScript class constructor was called without newRangeError: x can't be converted to BigInt because it isn't an integerJavaScript could not convert a non-integer value to BigInt

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JavaScript invalid date: causes and fixes | Error Atlas