ValueError is not handled properly by python in Timezonapalooza tutorial.

# import datetime and pytz library
from datetime import datetime
import pytz

OTHER_TIMEZONES = [
    pytz.timezone('US/Eastern'),
    pytz.timezone('Pacific/Auckland'),
    pytz.timezone('Asia/Calcutta'),
    pytz.timezone('Europe/Paris'),
    pytz.timezone('Africa/Khartoum')
]

# time & date output format
fmt = "%Y-%m-%d %H:%M:%S %Z%z"

# get meeting date & time from user
while True:
    date_input = input("When is your meeting? Please use MM/DD/YYYY HH:MM format. ")
    try:
        local_date = datetime.strptime(date_input, '%m/%d/%Y %H:%M')
    except ValueError:
        print("{} doesn't seem to be a valid date & time.".format(date_input))
    else:
        # localize date & time
        local_date = pytz.timezone('Africa/Johannesburg').localize(local_date)
        # covert date & time to utc
        utc_date = local_date.astimezone(pytz.utc)

# print meeting date & time in 6 different time zones.
    output = []
    for timezone in OTHER_TIMEZONES:
        output.append(utc_date.astimezone(timezone))
    for appointment in output:
        print(appointment.strftime(fmt))
    break