[wartijn_]

You seem to assume that everybody on this website knows what Ring UI is. But I didn't know and judging from quite a few other comments here, I wasn't the only one. All we had to go by was the title "JetBrains Ring UI" and a comment stating that a date picker looks nice. Without any kind of description it's not that weird to assume a website with a datepicker works decently on mobile.

[nsxwolf]

I wouldn't be investing effort improving the mobile browser behavior of desktop oriented controls for the benefit of making it a better HN submission.

[robertlagrant]

I think you've missed the point of the previous comment.