Alexa not detecting dates with slot AMAZON.DATE if spoken like December thirty first(one) 2013

Question

I am building a skill where user is required say his date of birth.

some examples are what he could say for this

 - September twenty fifth nineteen eighty seven 
 - Fourth January nineteen ninety
 - Four January two thousand four
 - Four January two zero zero four
 - March Fifteen two thousand one

I have used AMAZON.DATE for the slots. Alexa is failing to resolve the date in-fact, it fails to resolve the intent it self and its response is always

"I don't know that one"

below are the sample utterances I have used for this intent

DateOfBirth my date of birth is {dob}
DateOfBirth {dob} is my date of Birth 
DateOfBirth {dob} is my birth date 
DateOfBirth birth date is {dob} 
DateOfBirth it is {dob}
DateOfBirth {dob}

What can I do to make it work?

Answer 1

According to alexa documentation the type slot AMAZON.date accept only dates on or after the current date.So all your examples here will not work. for the full documentation please visit this url

Answer 2

I don't think it is the Date slot that is the problem. I have a skill that uses a date slot and when I put in a date that you mentioned, it returns correctly. For example:

Ask about exhibitions on September twenty fifth nineteen eighty seven

{
  "session": {
    "sessionId": "SessionId.removed",
    "application": {
    "applicationId": "amzn1.removed"
},
  "attributes": {},
  "user": {
    "userId": "removed"
},
  "new": true
},
  "request": {
  "type": "IntentRequest",
  "requestId": "EdwRequestId.removed",
  "locale": "en-US",
  "timestamp": "2017-06-19T18:14:00Z",
  "intent": {
    "name": "ExhibitionsIntent",
    "slots": {
      "Date": {
        "name": "Date",
        "value": "1987-09-25"
    }
  }
}
},
  "version": "1.0"
}

And here is the Intent in the Interaction Model:

ExhibitionsIntent exhibitions {Date}

{
  "slots": [
    {
      "name": "Date",
      "type": "AMAZON.DATE"
    }
  ],
  "intent": "ExhibitionsIntent"
},