UI/TZ issue: incorectly mapping DAGs

[ebacal]

Apache Airflow version:
1.10.9 and 1.10.10

Environment::

• MySQL 5.7, TZ=PST
• airflow.cfg tested with time_zone=system, Los_Angeles/America, utc

What happened:

1. From a schedule view by clicking on DAG with Execution date 18:00 PST it maps me to 18:00 UTC DAG instance
2. In Browse TASK INSTANCE view, sorted by state failed displays correct tasks but when I choose to clear them it clears task with UTC execution dates

How to reproduce it:

In UI click under "Schedule" on gray schedule time button for any DAG
Take first DAG and check its "Execution date"

click on it

open log and compare time stamps inside the log with "Execution date"

Bonus: miscalculating execution time in UI when in TZ aware:

1.10.10

UI TZ=UTC - Correct Execution time stamp

UI TZ=PST - Incorrect Execution time stamp

[boring-cyborg]

Thanks for opening your first issue here! Be sure to follow the issue template!

[ashb]

What frequency is your dag? Hourly? (This is not part of the problem, but would help in reproducing the issue)

[ebacal]

The one above is 5 min. I have tried 1/5/30 min intervals, as well.