How Can I Programmatically Verify the Validity of a Date?

How to verify a date's validity

Validating a date's accuracy is crucial, as invalid entries like "2/30/2011" can lead to errors. Here's a method to validate dates:

To validate a date string, convert it to a date object and test it. For example:

// Expect input as d/m/y
function isValidDate(s) {
  var bits = s.split('/');
  var d = new Date(bits[2], bits[1] - 1, bits[0]);
  return d && (d.getMonth() + 1) == bits[1];
}

['0/10/2017','29/2/2016','01/02'].forEach(function(s) {
  console.log(s + ' : ' + isValidDate(s))
})

This code will print the validity of the given dates:

0/10/2017 : false
29/2/2016 : true
01/02 : true

In this example, "0/10/2017" is invalid as there's no zeroth month, while "29/2/2016" and "01/02" are valid dates.

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