I am here in Auckland, New Zealand. Initially, I found the 4 hours, 25 hours time range is 13 behind our time. I fixed it by putting timezone configuration in php.ini.
However, it’s still one hour behind, which must be daylight saving.
Please see the screenshot I uploaded. The time under the graph is correct but besides 4 hours range, it one hour behind.
I remember that problem in PNP4nagios a long time ago also here in Northern Europe
Dind’t know that its still persisting.
Sorry for the question but: the local time of your checkmk machine is correct?