We can find some lists of the UTC time offsets, showing the difference in hours and minutes from Coordinated Universal Time (UTC), from the westernmost (−12:00) to the easternmost (+14:00).
In general, we save datetime using iso8601 format.
However - by default - we just includes some countries and regions.
And it is not very accurate. For instance, UTC+01:00
is for Paris, Rome, Stockholm, Tunis, even if those cities are not exactly on the same longitude...
I would like to be able to find the true UTC time offset from a geolocation, in order to have a local time based on the position of the sun in the sky.
I mean, instead of having UTC+01:00
near the Eiffel Tower at the geolocation 48.858844300000001,2.2943506
I would prefer to have UTC+01:13
for example.
How could we do, having a geolocation such as 48.352845300000001,40.9943506
, to get the true UTC time offset?
Thank you for any ideas.