¿Qué pasará de mayo a marzo?

"Results": [
    {
        "Text": "de mayo a marzo",
        "Start": 12,
        "End": 27,
        "TypeName": "datetimeV2.daterange",
        "Resolution": {
            "values": [
                {
                    "timex": "(XXXX-05-01,XXXX-03-01,P10M)",
                    "type": "daterange",
                    "start": "2018-05-01",
                    "end": "2019-03-01"
                }
            ]
        }
    }
]