@iju @hannorein I haven’t tried in a while but an iPhone used to be able to receive gps signal (eventually) with no other network. And that should have everything needed to give you your correct local time. That’s probably way too complicated for Siri to figure out 😂
Sep 29, 2026, 12:21 AMWhat I was aiming at was that knowing what time (inc. month and year) and place (longitude/lattitude) doesn't alone inform when sun rises. What they are is just the prerequirements to look it up based on historical (I assume) data.
You can probably do some simplification on the data needed by assuming that sun always rises at the same time (remembering date)on the same longitude, but ofc If you want to be precise you must be informed on surrounding mountains as well.
@iju @hannorein Time and position would be enough to know when the sun rises if the earth were a sphere with no topography though. It's just a geometry problem. If it doesn't bother you that you don't see the sun over that mountain until 15 minutes after "sunrise" then the answer is probably good enough. I'm not sure the iPhone takes topography into account unless you use an app like TPE.
Sep 29, 2026, 12:28 AMI did say it was enough to look it up, and probably you might preload the calculations to do so as well, but doesn't seem simple.
And it's not 15 minutes later. When I lived in Jyväskylä (which isn't //that// north, nor //that// hilly) you couldn't see sunrise around December at all. Even If you should have, in theory.