Looks like time check uses GMT in stead of CET

[Peter_Kawa]

Most probably:

@Peter_Kawa

The time format + timezone are derived from the location where Homey thinks it sits.
Sometimes it could just not be determined somehow, and your location is set somewhere in an ocean

It is a simple fix:
Go to location settings, move the map to set the pointer to an other timezone, wait for a minute, and then move the map again, to set the pointer to your location / somewhere in your timezone.