How to fix DateTime.Now retrieving an old false date?

I want to get the current date in my program for a certain porpusre althought when i am writing var date = DateTime.Now.ToString("yyyy-MM-dd"); the date which is assigned to the variable date is always the same date 23/06/1905 which is not the current date...

Code behind C#

        protected void Button1_Click(object sender, EventArgs e)
    {
        Session["user"] = "200000156";
        string score = hdnfldVariable.Value;
        var date = DateTime.Now.ToString("yyyy-MM-dd");
        String PlayerId = Session["user"].ToString();
        string insertCommand = "INSERT INTO gameResults(userID, gameDate, Result) VALUES('" 
                               + PlayerId + "'," + date + ", " + score + ")";
        MyAdoHelper.DoQuery("DataBaseRP.accdb", insertCommand);

    }