The daily chart doesn't display on the overview page during certain hours of the day because the overview.php script is not using the system timezone like other scripts do.

[dlk3]

Describe the bug
During certain hours of the day the daily chart image is not found for the top of the overview page due to the overview.php script not using the proper timezone.

To Reproduce
I am on US Eastern time so this problem occurs any time I view the overview page after 8:00pm

Expected behavior
The chart should just be there.

If I copy and paste the timezone lookup code that is in the top of the other scripts into the overview.php script, then the script works like it should and the chart is displayed. A patch file is attached.

[dlk3]

overview.php.timezone.patch.txt