Comment by VorpalWay

The same author also wrote the defacto standard regex library in Rust, and somewhat recently a new time and date library (jiff).

The comparison between jiff, chrono, time and hifitime is just as good of a read in my opinion: https://github.com/BurntSushi/jiff/blob/HEAD/COMPARE.md

(And they have also written interesting things on regex, non-regex string matching, etc.)