So by doing this it should work? ...
Dim datepicked As Date
datepicked = DateTimePicker1.Text
Dim AddCol4 As New DataGridViewTextBoxColumn
AddCol4.DataPropertyName = "Date"
AddCol4.HeaderText = "Date"
AddCol4.Name = "Date"
AddCol4.DefaultCellStyle.Format = "MM/dd/yyyy"
DataGridView1.Columns.Add(AddCol4)
For Each dgvr As DataGridViewRow In DataGridView1.Rows
dgvr.Cells("Date").Value = datepicked
Next
And it does.
Thanks, you are a gentleman and a a scholar :)