Hi,
you can use Mouse down evend and Valuechanged event of date time picker check the below code.
private void dateTimePicker1_ValueChanged(object sender, EventArgs e)
{
textBox1.Text = dateTimePicker1.Value.ToString("yyyy");
textBox2.Text = dateTimePicker1.Value.ToString("MM");
textBox3.Text = dateTimePicker1.Value.ToString("dd");
}
private void dateTimePicker1_MouseUp(object sender, MouseEventArgs e)
{
textBox1.Text = dateTimePicker1.Value.ToString("yyyy");
textBox2.Text = dateTimePicker1.Value.ToString("MM");
textBox3.Text = dateTimePicker1.Value.ToString("dd");
}