Server 
import socket
import datetime

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.bind(("127.0.0.1", 12345))
s.listen(5)

while True:
    cs, add = s.accept()
    print(f"server: connection from {add} has been established")
    val = ""

    while val != "exit":
        msg = cs.recv(1024)
        print("client: " + msg.decode("utf-8"))

        if msg.decode("utf-8") == "time":
            val = str(datetime.datetime.now().time())
            cs.send(bytes(val, "utf-8"))
        elif msg.decode("utf-8") == "date":
            val = str(datetime.datetime.now().date())
            cs.send(bytes(val, "utf-8"))
        elif msg.decode("utf-8") == "exit":
            break
        else:
            val = "invalid request"
            cs.send(bytes(val, "utf-8"))

    cs.close()

    
Client 
import socket

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect(("127.0.0.1", 12345))

while True:
    my = input("client: msg")
    s.send(bytes(my, "utf-8"))

    if my == "exit":
        break

    msg = s.recv(1024)
    print("server:", msg.decode("utf-8"))

Result: Concurrent Date Timer Server using TCP Sockets has been implemented 
 successfully.