v0.4.11

Improvements

• Support a space or T in FromStr for DateTime<Tz>, meaning that e.g.
  dt.to_string().parse::<DateTime<Utc>>() now correctly works on round-trip.
  (@quodlibetor in #378)
• Support "negative UTC" in parse_from_rfc2822 (@quodlibetor #368 reported in
  #102)
• Support comparisons of DateTimes with different timezones (@dlalic in #375)
• Many documentation improvements

Bitrot and external integration fixes

• Don't use wasmbind on wasi (@coolreader18 #365)
• Avoid deprecation warnings for Error::description (@AnderEnder and
  @quodlibetor #376)

Internal improvements

• Use Criterion for benchmarks (@quodlibetor)

v0.4.10

Compatibility notes

• Putting some functionality behind an alloc feature to improve no-std support (in #341) means that if you were relying on chrono with no-default-features and using any of the functions that require alloc support (i.e. any of the string-generating functions like to_rfc3339) you will need to add the alloc feature in your Cargo.toml.

Improvements

• DateTime::parse_from_str is more than 2x faster in some cases. (@michalsrb #358)
• Significant improvements to no-std and alloc support (This should also make many format/serialization operations induce zero unnecessary allocations) (@CryZe #341)

Features

• Functions that were accepting Iterator of Items (for example format_with_items) now accept Iterator of Borrow<Item>, so one can use values or references. (@michalsrb #358)
• Add built-in support for structs with nested Option<Datetime> etc fields (@manifest #302)

Internal/doc improvements

• Use markdown footnotes on the strftime docs page (@qudlibetor #359)
• Migrate from try! -> ? (question mark) because it is now emitting deprecation warnings and has been stable since rustc 1.13.0
• Deny dead code

v0.4.9

Fixes

• Make Datetime arithmatic adjust their offsets after discovering their new timestamps (@quodlibetor #337)
• Put wasm-bindgen related code and dependencies behind a wasmbind feature gate. (@quodlibetor #335)

v0.4.7

Fixes

• Disable libc default features so that CI continues to work on rust 1.13
• Fix panic on negative inputs to timestamp_millis (@cmars #292)
• Make LocalResult Copy/Eq/Hash

Features

• Add std::convert::From conversions between the different timezone formats (@mqudsi #271)
• Add timestamp_nanos methods (@jean-airoldie #308)
• Documentation improvements

v0.4.6

Maintenance

• Doc improvements -- improve README CI verification, external links
• winapi upgrade to 0.3

Features

• Added NaiveDate::from_weekday_of_month{,_opt} for getting eg. the 2nd Friday of March 2017.

v0.4.5

Features

• Added several more serde deserialization helpers (@novacrazy #258)
• Enabled all features on the playground (@davidtwco #267)
• Derive Hash on FixedOffset (@LuoZijun #254)
• Improved docs (@storyfeet #261, @quodlibetor #252)

v0.4.4

Features

• Added support for parsing nanoseconds without the leading dot (@emschwartz #251)

v0.4.3

Features

• Added methods to DateTime/NaiveDateTime to present the stored value as a number of nanoseconds since the UNIX epoch (@HarkonenBade #247)
• Added a serde serialise/deserialise module for nanosecond timestamps. (@HarkonenBade #247)
• Added "Permissive" timezone parsing which allows a numeric timezone to be specified without minutes. (@quodlibetor #242)

v0.4.2

Deprecations

• More strongly deprecate RustcSerialize: remove it from documentation unless the feature is enabled, issue a deprecation warning if the rustc-serialize feature is enabled (@quodlibetor #174)

Features

• Move all uses of the system clock behind a clock feature, for use in environments where we don't have access to the current time. (@jethrogb #236)
• Implement subtraction of two Dates, Times, or DateTimes, returning a Duration (@tobz1000 #237)

v0.4.1

Bug Fixes

• Allow parsing timestamps with subsecond precision (@jonasbb)
• RFC2822 allows times to not include the second (@upsuper)

Features

• New timestamp_millis method on DateTime and NaiveDateTim that returns number of milliseconds since the epoch. (@quodlibetor)
• Support exact decimal width on subsecond display for RFC3339 via a new to_rfc3339_opts method on DateTime (@dekellum)
• Use no_std-compatible num dependencies (@cuviper)
• Add SubsecRound trait that allows rounding to the nearest second (@dekellum)