Field value not updating when posting data via JSON Here I am getting 200 response but the date field over here is not getting updated.

The node is getting created and other fields are getting updated, only this date field is not getting created.

the error which iam  getting 

The Json and content type format is below:

"field_date_of_cage_card_creation": {
        "und": [
            {
                 "date":"17 Dec 2018",
                  "time":"02:45 pm",

                "timezone": "Asia/Kolkata",
                "timezone_db": "Asia/Kolkata",
                "date_type": "datetime"


            }
        ]
    },
You should be adding your date in the value property and not including a time.

"field_date_of_cage_card_creation": {
    "und": [
        {
            "value":"17 Dec 2018",
            // or maybe
            "value":"2018-12-17",
            "timezone": "Asia/Kolkata",
            "timezone_db": "Asia/Kolkata",
            "date_type": "datetime"
        }
    ]
},