Passing user's local timezone to celery in django app

I have a requirement where i want to show date time in user's local datetime. For which I have added a middleware code in django which gets the local date time from user's session through browser and activate that session.In my django settings.py I have added the timezone which is by default 'America/New york'

Now I have celery where the database operations are performed asynchronously. But in celery the timezone which I am activating in middleware is not getting through. It is always picking it up from django settings.py file.If i remove the default timezone setting then it is taking the timezone as 'America/Chicago'.

Below is my code for Middleware

# middleware.pyfrom django.utils import timezoneclass TimezoneMiddleware:    def __init__(self, get_response):        self.get_response = get_response    def __call__(self, request):        user_timezone = request.GET.get('user_timezone', 'America/New_York')        request.session['user_timezone'] = user_timezone        response = self.get_response(request)        return response

And here is my code for celery task

# tasks.pyfrom celery import Celery, Taskfrom django.contrib.sessions.models import Sessionfrom django.utils import timezoneapp = Celery('yourapp', broker='pyamqp://guest@localhost//')class TimezoneAwareTask(Task):    def __call__(self, *args, **kwargs):        # Get user timezone from session or use a default        user_timezone = self.get_user_timezone(kwargs.get('session_key'))        # Set the timezone for the task execution        timezone.activate(user_timezone)        try:             result = super(TimezoneAwareTask, self).__call__(*args, **kwargs)        finally:             timezone.deactivate()        return result    def get_user_timezone(self, session_key):        try:            session = Session.objects.get(session_key=session_key)            return session.get_decoded().get('user_timezone', 'America/New_York')        except Session.DoesNotExist:            return 'America/New_York'app.tasks.register(TimezoneAwareTask())

So here the task is going under exception i.e. SessionDoesNotExist and the local timezone of the user can't be fetched.