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    Variable validDateAssertionConst

    validDateAssertion: AssertionStandardSchemaSync<
        readonly [readonly ["to be a valid date", "to be date-like"]],
        ZodUnion<
            readonly [
                ZodDate,
                ZodUnion<readonly [ZodISODateTime, ZodISODate]>,
                ZodNumber,
            ],
        >,
        never,
    > = ...

    Asserts that the subject is a valid date (Date object, ISO string, or timestamp).

    expect(new Date(), 'to be a valid date'); // passes
    expect('2023-01-01T00:00:00Z', 'to be a valid date'); // passes
    expect(1640995200000, 'to be a valid date'); // passes
    expect('invalid', 'to be a valid date'); // fails

    unknown-to-be-a-valid-date

    date

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