### Discussed in https://github.com/apache/airflow/discussions/33345

<div type='discussions-op-text'>

<sup>Originally posted by **vuphamcs** August 11, 2023</sup>
### Description

Is there a variable similar to `prev_start_date_success` but for the previous DAG run’s completion date? The value I’m hoping to retrieve to use within the next DAG run is `2023-08-10 16:04:30`

![image](https://github.com/apache/airflow/assets/1600760/9e2af349-4c3e-47e1-8a1a-9d8827b56f57)


### Use case/motivation

One particular use case is to help guarantee that the next DAG run only queries data that was inserted during the existing DAG run, and not the past DAG run.

```python
prev_ts = context['prev_end_date_success']

sql = f"SELECT * FROM results WHERE created_at > {context['prev_end_date_success']}"
```

### Related issues

_No response_

### Are you willing to submit a PR?

- [ ] Yes I am willing to submit a PR!

### Code of Conduct

- [X] I agree to follow this project's [Code of Conduct](https://github.com/apache/airflow/blob/main/CODE_OF_CONDUCT.md)
</div>
def func(dag):
            
            raise RuntimeError(f"Should not be triggered, dag: {dag}")
        ti = self.create_ti(func, op_args=[1])
        error_message = re.escape("The key 'dag' in args is a part of kwargs and therefore reserved.")
        with pytest.raises(ValueError, match=error_message):
            ti.run()
    def test_provide_context_does_not_fail(self):
        """Ensures that provide_context doesn't break dags in 2.0."""
        def func(custom, dag):
            assert 1 == custom, "custom should be 1"
            assert dag is not None, "dag should be set"
        with pytest.warns(RemovedInAirflow3Warning):
            self.run_as_task(func, op_kwargs={"custom": 1}, provide_context=True)
    def test_context_with_conflicting_op_args(self):
        def func(custom, dag):
            assert 1 == custom, "custom should be 1"
            assert dag is not None, "dag should be set"
        self.run_as_task(func, op_kwargs={"custom": 1})
    def test_context_with_kwargs(self):