server.py

#!/usr/bin/env python

# server.py 
import socket, time, datetime, pytz

# create a socket object
serversocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM) 

# get local machine name
host = socket.gethostname()                           
port = 50000

# bind to the port
serversocket.bind((host, port))                                  

# queue up to 5 requests
serversocket.listen(5)                                           

print("Waiting for connection...")

while True:
    # establish a connection
    clientsocket,addr = serversocket.accept()    
    print("\nGot a connection from %s " % str(addr))
    
    while 1:
        print("Waiting for timezone...")
        tz = clientsocket.recv(1024)
    
        if tz == 'close':
            print("Bye! \n\nWaiting for connection...")
	    break

        if tz not in pytz.all_timezones:
            print("Try again!\n")
	    clientsocket.sendall("Sorry, not a valid timezone!\n")
	    continue
    
        timezone = "The time in "+tz+" got from the server is "+str(datetime.datetime.now(pytz.timezone(tz)))+"\n"
        clientsocket.sendall(timezone) 
        print("Done!\n")
    
    clientsocket.close()