[FlorianRappl]

Coming from .NET you should know Noda Time (https://nodatime.org) and the problem it solves. Consider moment the JS alternative, however, with JS native Date being more limited / broken than .NET's DateTime.

TL;DR: Goes way beyond standard formatting.

[Sacho]

The C# DateTime has more useful methods than JS Date, but DateTimeKind and the way it counts ticks makes it an absolute trap for anyone to use, so I wouldn't say it's less broken.