When I set a program to 15 minutes before sunrise, it tells me the next watering will occur at 20:11 (8:11 pm !). That's not the time of sunrise!

15 minutes before sunset also fails and computes a time like 12:48.

My wild guess would be that it computes the time for a wrong location or wrong time zone.

I'm in luxembourg and my timezone as well as my location were correctly identified during setup.