dennis-weyland-by opened a new issue #21493:
URL: https://github.com/apache/airflow/issues/21493


   ### Description
   
   Consider the following example:
   The current datetime is 2022-02-10 09:45 CET and airflow executed two runs:
   
   - daily_run scheduled to run every day at 09:43 CET
   - maintenance triggered manually at 2022-02-10 09:41 CET
   
   In the UI it looks like this:
   ![Screenshot 2022-02-10 at 09 45 
55](https://user-images.githubusercontent.com/71711396/153408199-14571a1d-c59e-4af8-858a-7a98ff7fe147.png)
   
   From someone new to airflow there are some unintuitive things for display:
   
   - Although both dags ran on the same day, they display different dates in 
the last run
   - The DateTime in the Next run column for daily_run is in the past
   
   On a technical level, this is documented. Airflow runs its schedule after 
the schedule interval is completed and what is displayed is the start_date of 
the interval similar to the start_date parameter of a DAG. As a developer, 
which works with Airflow, I have to read the documentation and act accordingly. 
So far this is fine.
   
   My point is, that not every consumer of the UI is familiar with Airflow and 
to some, this is very confusing and counterintuitive. 
   As a developer, I would like to have the option to switch the displayed days 
to the execution/run after date. This information is also already  there when 
using the info tooltip:
   ![Screenshot 2022-02-10 at 11 09 
31](https://user-images.githubusercontent.com/71711396/153410060-d35f63de-d877-4ab2-920f-c8f45c8bbc21.png)
 ![Screenshot 2022-02-10 at 11 09 
44](https://user-images.githubusercontent.com/71711396/153410093-7bfad215-54bc-40e4-acac-27fde3983190.png)
   
   **Summary**
   Introduce a config flag for the web-server that on the front page the actual 
time of the future/past execution of a scheduled dag is shown. Since this is a 
behavior inconsistent with internal airflow behavior, the flag should be 
disabled by default.
   
   **Optional: Extending this to DAg Details page**
   The Frontpage is not the only place the behavior is shown. So it might make 
sense that the flag would also change the following examples:
   **Tree View:**
   
   - Upper right: next Run
   - Calendar Filter
   - Column Name (and ordering) in Tree View
   
   ![Screenshot 2022-02-10 at 11 07 
29](https://user-images.githubusercontent.com/71711396/153411045-e7c423b3-cb8d-449e-b81e-f70b629acb55.png)
   
   **Calendar**:
   
   ![Screenshot 2022-02-10 at 11 08 
36](https://user-images.githubusercontent.com/71711396/153411446-ef5c48c3-3f52-4e51-915d-cccea90500ce.png)
   
    **Are you willing to submit a PR?** 
   My lack of javascript logic prevents me from doing a pr myself, but I would 
be willing to help on this issue if needed.
   
   ### Use case/motivation
   
   I use airflow to schedule/orchestrate ML pipelines like model training, 
predicting, and so on. I want to use the Airflow UI to further enable those 
pipelines to an audience, which is not accustomed to airflow. It turned out 
that the current behavior of how dates are displayed (especially with a mix of 
scheduled and manually triggered tasks) is very confusing for this use case and 
makes it hard to onboard people as WebUI-only users.
   
   ### 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)
   


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