airflow schedule interval timezone

from airflow.models import DAG
from airflow.operators.bash_operator import BashOperator
from datetime import datetime

import pytz
tz = pytz.timezone('Asia/Dubai')


def localize_utc_tz(d):
    return tz.fromutc(d)

default_args = {
    'start_date': datetime(2017, 11, 8),
}
dag = DAG(
    'plus_4_utc',
    default_args=default_args,
    schedule_interval='0 20 * * *',
    user_defined_filters={
        'localtz': localize_utc_tz,
    },
)
task = BashOperator(
        task_id='task_for_testing_file_log_handler',
        dag=dag,
        bash_command='echo UTC {{ ts }}, Local {{ execution_date | localtz }} next {{ next_execution_date | localtz }}',
)