Steps to reproduce:
- Open e.g. https://turnilo.wikimedia.org/#virtualpageviews_hourly/
- Under "Filter" click on "Latest day" to view or change the timespan covered
- The preselected date is not the latest day but in the past (e.g. right now I'm seeing "Mar 10 - Mar 11, 23:01pm" there)
- Clicking on a different option under "Latest" also picks the wrong dates (e.g. "30D" results in "Feb 9 - Mar 11, 23:01pm" for me right now)
On the other hand, the data itself seems up to date when viewed with the "fixed" instead of "relative" option (i.e. one can manually select a more recent timespan and data up to the last day is displayed). So it might just be the UI somehow failing to obtain the correct current date and time.