But trying to find stuff like this with Rust's documentation-- when you're using a search engine instead of relying on having a human to interpret the question for you-- is usually tremendously frustrating. My experience has been that Rust developers lean heavily on autogenerated documentation, where each method of a struct/enum is heavily documented but there are few to no examples or "E2E scenario" explanations to get you started from scratch.
That's why the above scenario took me an hour: first I had to discover chrono, then a while to realize it wouldn't do what I needed and actually had to use chrono_tz, then a while longer to find where the documentation for time format strings live, etc. All the methods were documented just fine, but there was no high-level explanation leading to them.
When I just did the search for C#, the first non-StackOverflow link was to Microsoft's autogenerated documentation. Without any examples, I'm not sure whether System.DateTime.Parse does what you want. Where would you have looked to get those examples/E2E scenarios for C#?
Did you look at the READMEs of those libraries? Most of the common use cases are documented fairly comprehensively there - I pulled those examples almost directly out of those documents