Here's an example showing how to convert from one timezone to another in Python. Note that you won't be able to save the full date/time in MySQL without stripping out the timezone info.
from string import atoi
from datetime import datetime
import pytz # Available http://sourceforge.net/project/showfiles.php?group_id=79122
thedate = "20080518"
thetime = "2210"
europe_tz = pytz.timezone('Europe/Paris') # Note that your local install timezone should be settings.py
brazil_tz = pytz.timezone('America/Sao_Paulo')
server_tz = pytz.timezone('America/Los_Angeles')