اینو مینویسم دقیق نیست شاید ولی کار میکنه!
private void timer1_Tick(object sender, EventArgs e)
{
label1.Text = DateTime.Now.ToString("hh:mm:ss:fff ");
if (DateTime.Now.ToString("HH:mm:ss:fff").Substring(0 , 2) == "01" && DateTime.Now.ToString("HH:mm:ss:fff").Substring(3, 2) == "22"&& DateTime.Now.ToString("HH:mm:ss:fff").Substring(6, 2) == "00"&&DateTime.Now.ToString("HH:mm:ss:fff").Substr ing(9,1) == "2")
{
label2.Text = "yes";
}
if (DateTime.Now.ToString("HH:mm:ss:fff").Substring(0 , 2) == "01" && DateTime.Now.ToString("HH:mm:ss:fff").Substring(3, 2) == "22" && DateTime.Now.ToString("HH:mm:ss:fff").Substring(6, 2) == "00" && DateTime.Now.ToString("HH:mm:ss:fff").Substring(9, 1) == "5")
{
label3.Text = "no";
}
}