parseAsUTC.vl

{
    "$schema": "https://vega.github.io/schema/vega-lite/v4.json",
    "data": {
        "values": [
            {
                "date": "2011-10-10"
            },
            {
                "date": "2011-10-12"
            }
        ]
    },
    "encoding": {
        "y": {
            "axis": {
                "title": "time"
            },
            "field": "date",
            "timeUnit": "utchours",
            "type": "ordinal"
        }
    },
    "mark": "point"
}