Real time based on geocoordinates

Configuration
1

Look for getting the exact time for my location not the time for my timezone.
i.e. to automate things base to the exact time on my location to be near the sun.
if I’am more to the west time based on the zone is behind the timezone base time, if more to the east timezone based vice versa.

From where does Homeassistant take the values for sunrise and sunset, are they based on geocoordinates, the should be a time based on the coordinates possible.

2

Go into settings / system / general and this is where you can set your coordinates.

3

The coordinates are not the problem, they are set in configuration.yaml since I use HA, that means about4 years.
And open and close my blinds on sunset/sunraise via automation.
What I do not know goes this with local timezone time oder exact time at my coordinates.
What I like to do is having displayed timezone time beside the real time at my coordinates
thanks