Sun up Sun under tomorrow

Which way can I get the Sun up and Sun down time for tomorrow and for today. If possible I want those times for my specific city. I want to use these times in a variable.

Can I use these variables in that case in a flow? When sun up is … then… Which way can I use those data. Would like to make a flow, when it’s 15 minutes before sun up, then… Or is this not possible.

I am aware of the apps but those are not exact what I want.