[moontear]

Works. Beautiful. Also works internationally. Good job!

It would be splendid if you used 24 hour format per default instead of AM/PM or at least let me choose. You correctly figured out I am at UTC+01:00, but we don't use AM/PM here.

I'm not perfectly happy with the colors in the final map. You use blue to represent right, yellowish for left and dark gray for "no sun". Your suggestion on top for preferred seating uses red. To me the preferred seating color should correspond with the left/right colors.

[Symbiote]

It says 13:31 for me, and it's just a <input type="time" ...> element. Is your browser using an AM/PM locale?

[Amithv]

Thanks for the suggestion.

Time selection relies on the default settings of the browser/system.

[moontear]

Right, locale is set to 24h but I do use US English as a language. I don’t see AM/PM anywhere, but on your site.