def METHOD_NAME(format_string):
    """
    Simulates the Django https://docs.djangoproject.com/en/dev/ref/templates/builtins/#now
    default templatetag
    Usage: {{ now('Y') }}
    """
    tzinfo = get_current_timezone() if settings.USE_TZ else None
    return defaultfilters.date(datetime.METHOD_NAME(tz=tzinfo), format_string)