obarisk opened a new issue, #62457:
URL: https://github.com/apache/airflow/issues/62457
### Apache Airflow version
3.1.7
### If "Other Airflow 3 version" selected, which one?
_No response_
### What happened?
the template variable `start_date` listed in document doesn't exist
an example dag
```python
@dag
def report_no_start_date():
@task
def print_context(**context):
print(context["start_date"])
@task(templates_exts=[".sql"])
def print_template(sql):
print(sql)
print_context()
print_template("demo.sql")
report_no_start_date()
```
with a template file `demo.sql`
```sql
select '{{ start_date }}';
```
### What you think should happen instead?
at least two options
a. remove `start_date` from the template document.
dag developer could find start_date from `dag_run.start_date` or
`task_instance.start_date` (the type is `datetime.datetime`)
b. add `start_date` (`pendulum.DateTime`) into context
### How to reproduce
use the dag in the description.
### Operating System
debian
### Versions of Apache Airflow Providers
_No response_
### Deployment
Other Docker-based deployment
### 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
- [x] I agree to follow this project's [Code of
Conduct](https://github.com/apache/airflow/blob/main/CODE_OF_CONDUCT.md)
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