datetime-rs VS ngx-moment

Yep! Most examples in the Rust cookbook[0] uses chrono[1].

But note that before Chrono there were other time libraries; one of them was called time[2] - IIRC it was created from code removed from Rust's stdlib std::time[3]. It eventually proved to be the best decision: designing a good API is a hard effort, and any design was prone to have mistakes and warts.

Chrono provides interoperability with both std::time and the time crate. It acknowledges other datetime crates that it was inspired, like datetime-rs[3] which itself was inspired by Joda time.

[0] https://rust-lang-nursery.github.io/rust-cookbook/datetime.h...

[1] https://crates.io/crates/chrono

[2] https://crates.io/crates/time

[3] https://github.com/depp/datetime-rs

Yep, indeed there are ways to migrate, but it's not necessarily easy. For instance in my last project, we used moment-timezone, and integrated other libraries such as https://github.com/urish/ngx-moment to format date/times in component templates. Of course it's possible to move away from that, but it would take time away from more useful work.