MongoDB Compass - How To Insert Date Type?

Try like this:

{
"type":"grunt",
"last_used": {
        "$date": "2018-04-15T16:54:40.000Z"
    },
"created_at": {
        "$date": "2018-04-15T16:54:40.000Z"
    }
}

Try like this:

2016-01-24T13:21:55.000