timezone bug in overview.php

[ghulands]

Describe the bug
After the clock has rolled over to the next day UTC, the overview chart fails to load.

To Reproduce
Steps to reproduce the behavior:

1. wait for a new UTC day to start.
2. refresh the overview page
3. the overview chart doesn't draw.

Expected behavior
the overview chart shows 24/7

Code or log snippets

The issue is the overview.php here is not using the system's timezone or php has lost the system timezone from the call of date_default_timezone_set in the index.php. Maybe it's a different process of php running.

[alexbelgium]

Hi, this repo is inactive since a long time you should use this one : https://github.com/Nachtzuster/BirdNET-Pi