Links:
* [ISO 8601](https://www.iso.org/iso-8601-date-and-time-format.html)
* [RFC 3339](https://datatracker.ietf.org/doc/html/rfc3339)
* [RFC 8536](https://datatracker.ietf.org/doc/html/rfc8536)
* [About the IANA Time Zone Database](https://data.iana.org/time-zones/tz-link.html)
* [Lisp code for *Calendrical calculations*](https://github.com/EdReingold/calendar-code2)
* [Time zones](https://en.wikipedia.org/wiki/Time_zone)
* [SOFA](https://www.iausofa.org/)
* [C++ Chrono Extension](https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0355r7.html)
* [TC39 "Temporal"](https://tc39.es/proposal-temporal/docs/)
* [MUSL `tzset`](https://git.musl-libc.org/cgit/musl/tree/src/time/__tz.c#n127)
* ["The Long, Painful History of Time"](https://naggum.no/lugm-time.html)
Other Rust crates:
* [Flexible datetime parsing](https://crates.io/crates/parse_datetime)
* [hifitime](https://docs.rs/hifitime/latest/hifitime/index.html)
* [hifitime model checking](https://model-checking.github.io/kani-verifier-blog/2023/03/31/how-kani-helped-find-bugs-in-hifitime.html)
* [kine](https://crates.io/crates/kine)
Read/perused:
* [ISO 8601 summary](https://www.cl.cam.ac.uk/~mgk25/iso-time.html)
* [POSIX `TZ` environment variable](https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap08.html)
* [Joda Time User Guide](https://www.joda.org/joda-time/userguide.html)
* [JSR 310](https://jcp.org/aboutJava/communityprocess/pfd/jsr310/JSR-310-guide.html)
* [`java.time` API](https://docs.oracle.com/javase/8/docs/api/java/time/package-summary.html)
* [Leap seconds](https://en.wikipedia.org/wiki/Leap_second)
* [Actual leap seconds](https://hpiers.obspm.fr/iers/bul/bulc/ntp/leap-seconds.list)
* [Even more leap seconds](https://maia.usno.navy.mil/ser7/tai-utc.dat)
* [Koka's standard `time` library](https://koka-lang.github.io/koka/doc/std_time.html)
* ["Seconds Since the Epoch"](https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap04.html#tag_04_16)
* [Unix time and leap seconds](https://en.wikipedia.org/wiki/Unix_time#Leap_seconds)
* [UTC-SLS](https://www.cl.cam.ac.uk/~mgk25/time/utc-sls/)
* [`time` crate's issue on `localtime_r` unsoundness](https://github.com/time-rs/time/issues/293)
* [Pure Rust implementation of `localtime_r`](https://github.com/x-hgg-x/tz-rs)
* [Interesting issue about TAI support in Chrono](https://github.com/chronotope/chrono/issues/21)
* [NIST leap seconds via FTP](ftp://ftp.boulder.nist.gov/pub/time/leap-seconds.list)
* [Interesting use case from dtolnay for `Date` type](https://github.com/chronotope/chrono/issues/820)
* [Desirable characteristics of time systems](https://www.ucolick.org/~sla/leapsecs/picktwo.html)
Names:
* `wheel`
* `gigawatt`
* `pend`
* `planck`
* `jiff`, `jiffy`