Hi muhammad12,
You need to set the widgetPositioning attribute and set the horizontal and vertical properties in bootstrap DateTimePicker plugin.
Please refer below sample.
HTML
<meta name="viewport" content="width=device-width, initial-scale=1" />
<link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" />
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-datetimepicker/4.17.37/css/bootstrap-datetimepicker.css" />
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<script type="text/javascript" src="http://maxcdn.bootstrapcdn.com/bootstrap3.3.7/js/bootstrap.min.js"></script>
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.9.0/moment-with-locales.js"></script>
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-datetimepicker/4.17.37/js/bootstrap-datetimepicker.min.js"></script>
<div class="form-group" style="margin: 30px">
    <div id="dvDatePicker" class='input-group date' style="width: 200px">
        <div class="container">
            <div class="panel panel-primary">
                <div class="panel-heading">
                    Airport Operations Tracking System</div>
                <div class="panel-body">
                    <asp:Panel runat="server" ID="pnlDynamic">
                    </asp:Panel>
                </div>
            </div>
        </div>
        <script type="text/javascript">
            $(function () {
                $('.datepicker').datetimepicker({
                    widgetPositioning: {
                        horizontal: "auto",
                        vertical: "Bottom"
                    },
                    format: 'LT'
                });
            });
            $('.datepicker').click(function () {
                return false;
            });
        </script>
    </div>
</div>
Namespaces
C#
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
Code
C#
protected void Page_Load(object sender, EventArgs e)
{
    DataTable dt = new DataTable();
    string conString = ConfigurationManager.ConnectionStrings["constr"].ConnectionString;
    string query = @"SELECT * FROM [Event]";
    query += "ORDER BY ";
    query += "CASE WHEN property = 'TextBox' THEN 0 ";
    query += "WHEN property = 'Button' THEN 1 ";
    query += "END";
    using (SqlConnection con = new SqlConnection(conString))
    {
        using (SqlCommand cmd = new SqlCommand(query, con))
        {
            using (SqlDataAdapter sda = new SqlDataAdapter(cmd))
            {
                sda.Fill(dt);
            }
        }
    }
    DataRow[] textBoxes = dt.Select("property='TextBox'");
    DataRow[] buttons = dt.Select("property='Button'");
    Table table = new Table();
    TableRow tr = new TableRow();
    for (int i = 0; i < textBoxes.Length; i++)
    {
        TableCell cell = new TableCell();
        Label lbl = new Label();
        lbl.Text = textBoxes[i]["EventName"].ToString();
        cell.Controls.Add(lbl);
        Literal lt = new Literal();
        lt.Text = "<br /><br />";
        cell.Controls.Add(lt);
        TextBox txt = new TextBox();
        txt.ID = "txt" + textBoxes[i]["EventName"].ToString();
        cell.Controls.Add(txt);
        if (i % 3 == 0 && i != 0)
        {
            tr = new TableRow();
        }
        else
        {
            tr.Cells.Add(cell);
        }
        if (i % 2 == 0 && i != 0)
        {
            table.Rows.Add(tr);
        }
        else
        {
            tr.Cells.Add(cell);
            if (textBoxes.Length == i + 1)
            {
                table.Rows.Add(tr);
            }
        }
    }
    tr = new TableRow();
    for (int i = 0; i < buttons.Length; i++)
    {
        TableCell cell = new TableCell();
        Label lbl = new Label();
        lbl.Text = buttons[i]["EventName"].ToString();
        cell.Controls.Add(lbl);
        Literal lt = new Literal();
        lt.Text = "<br /><br />";
        cell.Controls.Add(lt);
        Button btn = new Button();
        btn.Text = DateTime.Now.ToShortTimeString();
        btn.ID = "btn" + buttons[i]["EventName"].ToString();
        btn.CssClass = "datepicker";
        cell.Controls.Add(btn);
        lt = new Literal();
        lt.Text = "<br /><br />";
        cell.Controls.Add(lt);
        Label lblTime = new Label();
        lblTime.ID = "lbl" + buttons[i]["EventName"].ToString();
        cell.Controls.Add(lblTime);
        //tr.Cells.Add(cell);
        if (i % 3 == 0 && i != 0)
        {
            tr = new TableRow();
        }
        else
        {
            tr.Cells.Add(cell);
        }
        if (i % 2 == 0 && i != 0)
        {
            table.Rows.Add(tr);
        }
        else
        {
            tr.Cells.Add(cell);
            if (buttons.Length == i + 1)
            {
                table.Rows.Add(tr);
            }
        }
    }
    //table.Rows.Add(tr);
    pnlDynamic.Controls.Add(table);
}
Screenshot
