Show time before message in socket programming

Question

I want to make a messaging app. When I send a message, I want the clock to write before the message. How do I add the time? I'm about to go crazy..

This is server codes.

global zaman
zaman = str(time.strftime('%H') + ":" + time.strftime('%M') + " - ")

def gelen_mesaj():
    while True:
        client, client_address = SERVER.accept()
        print("%s:%s bağlandı."%client_address)
        client.send(bytes("Şarj Takip Uygulaması \n"+ "Bağlantı İsminizi Giriniz: ", "utf-8"))
        addresses[client] = client_address
        Thread(target=baglan_client, args=(client,)).start()

def baglan_client(client):
    isim = client.recv(BUFFERSIZE).decode("utf-8")
    bisim = "Bağlanan İsim %s."%isim
    client.send(bytes(bisim, "utf-8"))
    msg = "%s, Takip Kanalına Bağlandı."%isim
    yayin(bytes(msg, "utf-8"))
    clients[client] = isim
    while True:
        msg = client.recv(BUFFERSIZE)
        if msg != bytes("{kapat}", "utf-8"):
            yayin(msg, isim +": ")
        else:
            client.send(bytes("{kapat}", "utf-8"))
            client.close()
            del clients[client]
            yayin(bytes("%s Uygulamadan Çıkış Yaptı."%isim, "utf-8"))
            break

And clients codes

def gelen_mesaj():
    while True:
        try:
            msg = client_socket.recv(BUFFERSIZE).decode("utf8")
            mesaj_listesi.insert(tkinter.END, msg)
        except OSError:
            break

def gonder(event=None):
    msg = mesajim.get()
    mesajim.set("")
    client_socket.send(bytes(msg, "utf8"))
    if msg == "{kapat}":
        client_socket.close()
        app.quit()