Sonins opened a new pull request #20508:
URL: https://github.com/apache/airflow/pull/20508


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   ---
   related: #17720 
   closes: #17720 
   
   There was problem that days_ago only uses utc time. 
   If dag is set start_date with days_ago, then dag is scheduled in utc time.
   
   After fixing this, the dags using days_ago are scheduled in local time.
   
   For example, the dag below in timezone `Asia/Seoul`
   
   ```python
   from airflow import DAG
   from airflow.operators.dummy import DummyOperator
   
   from airflow.utils.dates import days_ago
   
   with DAG(
       dag_id = "test_days_ago_dag",
       start_date=days_ago(7),
       schedule_interval="0 2 * * *"
   ) as dag:
       dumb = DummyOperator(task_id="test_dummy", dag=dag)
   ```
   
   is scheduled like below.
   
   
   
![airflow_schedule](https://user-images.githubusercontent.com/26663842/147425512-1f655ca4-ee22-45e2-bb3e-9e7bbc2b4971.png)
   
   
   


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