* Returns false if argument is Invalid Date and true otherwise.
8
* Argument is converted to Date using `toDate`. See [toDate](https://date-fns.org/docs/toDate)
9
* Invalid Date is a Date, whose time value is NaN.
10
*
11
* Time value of Date: http://es5.github.io/#x15.9.1.1
12
*
13
* @typeParam DateType - The `Date` type, the function operates on. Gets inferred from passed arguments. Allows to use extensions like [`UTCDate`](https://github.com/date-fns/utc).