[Chrono][docsrs]: Timezone-aware date and time handling========================================[![Chrono GitHub Actions][gh-image]][gh-checks][![Chrono on crates.io][cratesio-image]][cratesio][![Chrono on docs.rs][docsrs-image]][docsrs][![Chat][discord-image]][discord][![codecov.io][codecov-img]][codecov-link][gh-image]: https://github.com/chronotope/chrono/actions/workflows/test.yml/badge.svg?branch=main[gh-checks]: https://github.com/chronotope/chrono/actions/workflows/test.yml?query=branch%3Amain[cratesio-image]: https://img.shields.io/crates/v/chrono.svg[cratesio]: https://crates.io/crates/chrono[docsrs-image]: https://docs.rs/chrono/badge.svg[docsrs]: https://docs.rs/chrono[discord-image]: https://img.shields.io/discord/976380008299917365?logo=discord[discord]: https://discord.gg/sXpav4PS7M[codecov-img]: https://img.shields.io/codecov/c/github/chronotope/chrono?logo=codecov[codecov-link]: https://codecov.io/gh/chronotope/chronoChrono aims to provide all functionality needed to do correct operations on dates and times in the[proleptic Gregorian calendar](https://en.wikipedia.org/wiki/Proleptic_Gregorian_calendar):* The [`DateTime`](https://docs.rs/chrono/latest/chrono/struct.DateTime.html) type is timezone-aware  by default, with separate timezone-naive types.* Operations that may produce an invalid or ambiguous date and time return `Option` or  [`MappedLocalTime`](https://docs.rs/chrono/latest/chrono/offset/enum.MappedLocalTime.html).* Configurable parsing and formatting with an `strftime` inspired date and time formatting syntax.* The [`Local`](https://docs.rs/chrono/latest/chrono/offset/struct.Local.html) timezone works with  the current timezone of the OS.* Types and operations are implemented to be reasonably efficient.Timezone data is not shipped with chrono by default to limit binary sizes. Use the companion crate[Chrono-TZ](https://crates.io/crates/chrono-tz) or [`tzfile`](https://crates.io/crates/tzfile) forfull timezone support.## DocumentationSee [docs.rs](https://docs.rs/chrono/latest/chrono/) for the API reference.## Limitations* Only the proleptic Gregorian calendar (i.e. extended to support older dates) is supported.* Date types are limited to about +/- 262,000 years from the common epoch.* Time types are limited to nanosecond accuracy.* Leap seconds can be represented, but Chrono does not fully support them.  See [Leap Second Handling](https://docs.rs/chrono/latest/chrono/naive/struct.NaiveTime.html#leap-second-handling).## Crate featuresDefault features:* `alloc`: Enable features that depend on allocation (primarily string formatting).* `std`: Enables functionality that depends on the standard library. This is a superset of `alloc`  and adds interoperation with standard library types and traits.* `clock`: Enables reading the local timezone (`Local`). This is a superset of `now`.* `now`: Enables reading the system time (`now`).* `wasmbind`: Interface with the JS Date API for the `wasm32` target.Optional features:* `serde`: Enable serialization/deserialization via [serde].* `rkyv`: Deprecated, use the `rkyv-*` features.* `rkyv-16`: Enable serialization/deserialization via [rkyv], using 16-bit integers for integral `*size` types.* `rkyv-32`: Enable serialization/deserialization via [rkyv], using 32-bit integers for integral `*size` types.* `rkyv-64`: Enable serialization/deserialization via [rkyv], using 64-bit integers for integral `*size` types.* `rkyv-validation`: Enable rkyv validation support using `bytecheck`.* `arbitrary`: Construct arbitrary instances of a type with the Arbitrary crate.* `unstable-locales`: Enable localization. This adds various methods with a `_localized` suffix.  The implementation and API may change or even be removed in a patch release. Feedback welcome.* `oldtime`: This feature no longer has any effect; it used to offer compatibility with the `time` 0.1 crate.Note: The `rkyv{,-16,-32,-64}` features are mutually exclusive.[serde]: https://github.com/serde-rs/serde[rkyv]: https://github.com/rkyv/rkyv## Rust version requirementsThe Minimum Supported Rust Version (MSRV) is currently **Rust 1.62.0**.The MSRV is explicitly tested in CI. It may be bumped in minor releases, but this is not donelightly.## LicenseThis project is licensed under either of* [Apache License, Version 2.0](https://www.apache.org/licenses/LICENSE-2.0)* [MIT License](https://opensource.org/licenses/MIT)at your option.