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UTC-based astimezone filter

Author:
miracle2k
Posted:
October 27, 2011
Language:
Python
Version:
1.3
Score:
0 (after 0 ratings)

A version of http://djangosnippets.org/snippets/2388/ which assumes UTC-based dates.

This is when you store dates in UTC (as you should), and want to display them in your site's local timezone, and you notice that Django's timesince/time template tags still do not support timezones.

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from django import template
from django.conf import settings

import pytz

register = template.Library()

@register.filter
def astimezone(date, destination=None):
    if not destination:
        destination = settings.TIME_ZONE

    if date.tzinfo:
        return date.astimezone(pytz.timezone(destination))
    else:
        return pytz.timezone('UTC').localize(date).astimezone(pytz.timezone(destination))

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