from django import template
from dateutil import tz
import datetime

register = template.Library()

@register.filter
def timeto(value):
    now = datetime.datetime.now(tz.tzutc())
    diff = value.astimezone(tz.tzutc()) - now
    minutes = diff.seconds / 60
    hours = minutes / 60
    mins = minutes - (hours * 60)
    return '%dhr %dmin' % (hours, mins)