docker compose load example dags error when timezone is not utc

[vagetablechicken]

Apache Airflow version

3.1.8

If "Other Airflow 3 version" selected, which one?

No response

What happened?

I followed https://airflow.apache.org/docs/apache-airflow/stable/howto/docker-compose/index.html, start airflow by docker compose.

And the version is 3.1.8, curl -LfO 'https://airflow.apache.org/docs/apache-airflow/3.1.8/docker-compose.yaml'. I set AIRFLOW__CORE__DEFAULT_TIMEZONE to 'Asia/Shanghai'.

Two dags have import error, example_outlet_event_extra.py and example_inlet_event_extra.py.

The errors are the same:

Traceback (most recent call last):
  File "/home/airflow/.local/lib/python3.12/site-packages/airflow/sdk/_shared/timezones/timezone.py", line 94, in convert_to_utc
    return pendulum.instance(value.astimezone(utc))
                             ^^^^^^^^^^^^^^^^^^^^^
  File "/home/airflow/.local/lib/python3.12/site-packages/pendulum/datetime.py", line 1276, in astimezone
    dt = super().astimezone(tz)
         ^^^^^^^^^^^^^^^^^^^^^^
OverflowError: date value out of range

What you think should happen instead?

airflow/airflow-core/src/airflow/example_dags/example_inlet_event_extra.py

Line 36 in 32f3fcc

start_date=datetime.datetime.min,

We set start_date to min, then pendulum can't support it, and it's timezone bug, cuz I set tz to 'Asia/Shanghai', no error when use default tz utc.

start_date should be datetime.datetime.min.replace(tzinfo=datetime.timezone.utc) or datetime.datetime(1970, 1, 1, tzinfo=datetime.timezone.utc), to avoid tz covert overflow error?

How to reproduce

docker compose up -d, then open ui, import error like:

Operating System

docker

Versions of Apache Airflow Providers

No response

Deployment

Docker-Compose

Deployment details

No response

Anything else?

No response

Are you willing to submit PR?

• Yes I am willing to submit a PR!

Code of Conduct

• I agree to follow this project's Code of Conduct

[henry3260]

Thanks for reporting! Do you want to raise a PR on this?

[vagetablechicken]

Thanks for reporting! Do you want to raise a PR on this?

Sure, I’ll raise a PR for this. I plan to follow other example dags, use 1970-01-01 as the start_date to ensure the tz convertion is error-free.