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Update Rust crate time to v0.3.47#51

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Update Rust crate time to v0.3.47#51
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@renovate renovate bot commented Mar 27, 2026

This PR contains the following updates:

Package Type Update Change
time (source) dependencies patch 0.3.50.3.47

Release Notes

time-rs/time (time)

v0.3.47

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Security
  • The possibility of a stack exhaustion denial of service attack when parsing RFC 2822 has been
    eliminated. Previously, it was possible to craft input that would cause unbounded recursion. Now,
    the depth of the recursion is tracked, causing an error to be returned if it exceeds a reasonable
    limit.

    This attack vector requires parsing user-provided input, with any type, using the RFC 2822 format.

Compatibility
  • Attempting to format a value with a well-known format (i.e. RFC 3339, RFC 2822, or ISO 8601) will
    error at compile time if the type being formatted does not provide sufficient information. This
    would previously fail at runtime. Similarly, attempting to format a value with ISO 8601 that is
    only configured for parsing (i.e. Iso8601::PARSING) will error at compile time.
Added
  • Builder methods for format description modifiers, eliminating the need for verbose initialization
    when done manually.
  • date!(2026-W01-2) is now supported. Previously, a space was required between W and 01.
  • [end] now has a trailing_input modifier which can either be prohibit (the default) or
    discard. When it is discard, all remaining input is ignored. Note that if there are components
    after [end], they will still attempt to be parsed, likely resulting in an error.
Changed
  • More performance gains when parsing.
Fixed
  • If manually formatting a value, the number of bytes written was one short for some components.
    This has been fixed such that the number of bytes written is always correct.
  • The possibility of integer overflow when parsing an owned format description has been effectively
    eliminated. This would previously wrap when overflow checks were disabled. Instead of storing the
    depth as u8, it is stored as u32. This would require multiple gigabytes of nested input to
    overflow, at which point we've got other problems and trivial mitigations are available by
    downstream users.

v0.3.46

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Added
  • All possible panics are now documented for the relevant methods.

  • The need to use #[serde(default)] when using custom serde formats is documented. This applies
    only when deserializing an Option<T>.

  • Duration::nanoseconds_i128 has been made public, mirroring
    std::time::Duration::from_nanos_u128.

  • Various methods for truncating components have been added, avoiding the need to call the fallible
    replace methods multiple times.

    For PrimitiveDateTime, UtcDateTime, and OffsetDateTime:

    • truncate_to_day

    For Time, PrimitiveDateTime, UtcDateTime, and OffsetDateTime:

    • truncate_to_hour
    • truncate_to_minute
    • truncate_to_second
    • truncate_to_millisecond
    • truncate_to_microsecond
Changed
  • The minimum supported Rust version is now 1.88.0.
  • Significant performance gains in numerous locations. No public APIs were changed or removed as
    part of this.
  • The size of error::ComponentRange, along with types that contain it, has been significantly
    reduced.
Fixed
  • The PartialOrd and Ord implementations of UtcOffset now return the expected result.

v0.3.45

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Added
  • time::format_description::StaticFormatDescription type alias for &'static [BorrowedFormatItem<'static>]. This is the type returned by the
    time::macros::format_description! macro.
Changed
  • The minimum supported Rust version is now 1.83.0.
  • All floating point methods on Duration are now const fn.
  • All setters on Parsed are now const fn.
  • The serde dependency has been replaced with serde_core, This reduces compile times by not
    including unused parts of serde.
  • Date::from_julian_day uses a new algorithm, resulting in an approximately 16% performance
    improvement. This method is used internally by numerous other methods.
  • util::is_leap_year uses a new algorithm, resulting in an approximately 8% performance
    improvement.

v0.3.44

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Fixed
  • Comparisons of PrimitiveDateTime, UtcDateTime, and OffsetDateTime with differing signs (i.e.
    one negative and one positive year) would return the inverse result of what was expected. This was
    introduced in v0.3.42 and has been fixed.
  • Type inference would fail due to feature unification when wasm-bindgen enabled serde_json.
    This has been fixed by explicitly specifying the type in the relevant locations.

v0.3.43

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Added
  • Support for rand 0.9
Fixed
  • In the convert module, any use of per with types that were not the same (such as
    Nanosecond::per(Second)) would not compile due to a bug. This has been fixed.

v0.3.42

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Added
  • Time::duration_until
  • Time::duration_since
  • per_t method for all types in time::convert. This is similar to the existing per method, but
    can return any of the primitive numeric types that can represent the result. This will cut down on
    as casts while ensuring correctness. Type inference isn't perfect, so you may need to provide a
    type annotation in some situations.
  • impl PartialOrd for Month and impl Ord for Month; this assumes the months are in the same year
  • SystemTimeExt trait, adding methods for checked arithmetic with time::Duration and obtaining
    the difference between two SystemTimes as a time::Duration
  • Permit using UtcDateTime with rand (this was inadvertently omitted previously)
  • impl core::error::Error for all error types (now available when the std feature is disabled)
  • MacOS can now obtain the local UTC offset in multi-threaded programs as the system APIs are
    thread-safe.
  • #[track_caller] has been added to all relevant methods.
Changed
  • The minimum supported Rust version is now 1.81.0.
  • The dependency on itoa has been removed, as the standard library now has similar functionality
    by default.
  • Formatting a component that involves a floating point number is now guaranteed to be
    deterministic, avoiding any subtle differences between platforms or compiler versions.
Fixed
  • Serializing timestamps with nanosecond precision should always emit the correct value.
    Previously, it could be off by one nanosecond due to floating point imprecision.
  • A previously unknown bug in OffsetDateTime::to_offset and UtcDateTime::to_offset has been
    fixed. The bug could result in a value that was invalid. It was unlikely to ever occur in
    real-world code, as it involved passing a UTC offset that has never been used in any location.
Miscellaneous
  • The amount of code generated by macros has been massively reduced, on the order of 65-70% for
    typical use cases of format_description!.
  • Significant performance gains for comparisons of Time, PrimitiveDateTime, UtcDateTime, and
    OffsetDateTime. The first three have gains of approximately 85% (i.e. 6× faster).
  • Nearly all methods are #[inline].

v0.3.41

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Fixed
  • Compatibility with the latest release of deranged. This fix is permanent and covers future
    similar changes upstream.

v0.3.40

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Added
  • Visibility modifiers may now be added to the mod generated by time::sere::format_description!.

v0.3.39

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Fixed
  • Doc tests run successfully with the default feature set.
  • wasm builds work again.

Both of these were regressions in v0.3.38 and are now checked in CI.

v0.3.38

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Added
  • The [year] component (in format descriptions) now supports a range modifier, which can be
    either standard or extended. The default is extended for backwards compatibility. This is
    intended as a manner to opt out of the extended range when the large-dates feature is enabled.
    When the large-dates feature is not enabled, the modifier has no effect.

  • UtcDateTime, which is semantically equivalent to an OffsetDateTime with UTC as its offset. The
    advantage is that it is the same size as a PrimitiveDateTime and has improved operability with
    well-known formats.

    As part of this, there were some other additions:

    • utc_datetime! macro, which is similar to the datetime! macro but constructs a UtcDateTime.
    • PrimitiveDateTime::as_utc
    • OffsetDateTime::to_utc
    • OffsetDateTime::checked_to_utc
  • time::serde::timestamp::milliseconds_i64, which is a module to serialize/deserialize timestamps
    as the Unix timestamp. The pre-existing module does this as an i128 where an i64 would
    suffice. This new module should be preferred.

Changed
  • error::Format has had its source() implementation changed to no longer return a boxed value
    from the ComponentRange variant. If you were explicitly expecting this, you will need to update
    your code. The method API remains unchanged.
  • [year repr:century] supports single-digit values.
  • All format_into methods accept ?Sized references.
Miscellaneous
  • Some non-exhaustive enum variants that are no longer used have been modified to be statically
    proven as uninhabited. The relevant fields are doc-hidden and not semver-guaranteed to remain as
    such, though it is unlikely to change.
  • An unnecessary check when parsing RFC 2822 has been removed.
  • Various methods have had their implementations changed, resulting in significant performance
    gains. Among the methods changed are
    • util::is_leap_year
    • util::weeks_in_year
    • Month::length
    • Date::to_calendar_date
    • Date::month
    • Date::day
    • Date::from_julian_day
    • Date::to_julian_day
    • other methods that call into these methods

v0.3.37

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Added
  • Time::MAX, equivalent to time!(23:59:59.999999999)
  • [year repr:century] is now supported in format descriptions. When used in conjunction with
    [year repr:last_two], there is sufficient information to parse a date. Note that with the
    large-date feature enabled, there is an ambiguity when parsing the two back-to-back.
  • Parsing of strftime-style format descriptions, located at
    time::format_description::parse_strftime_borrowed and
    time::format_description::parse_strftime_owned
  • time::util::refresh_tz and time::util::refresh_tz_unchecked, which updates information
    obtained via the TZ environment variable. This is equivalent to the tzset syscall on Unix-like
    systems, with and without built-in soundness checks, respectively.
  • Month::length and util::days_in_month, replacing util::days_in_year_month.
  • Expressions are permitted in time::serde::format_description! rather than only paths. This also
    drastically improves diagnostics when an invalid value is provided.
Changed
  • Obtaining the system UTC offset on Unix-like systems should now succeed when multi-threaded.
    However, if the TZ environment variable is altered, the program will not be aware of this until
    time::util::refresh_tz or time::util::refresh_tz_unchecked is called. refresh_tz has the
    same soundness requirements as obtaining the system UTC offset previously did, with the
    requirements still being automatically enforced. refresh_tz_unchecked does not enforce these
    requirements at the expense of being unsafe. Most programs should not need to call either
    function.

    Due to this change, the time::util::local_offset module has been deprecated in its entirety. The
    get_soundness and set_soundness functions are now no-ops.

    Note that while calls should succeed, success is not guaranteed in any situation. Downstream
    users should always be prepared to handle the error case.

Fixed
  • Floating point values are truncated, not rounded, when formatting.
  • RFC3339 allows arbitrary separators between the date and time components.
  • Serialization of negative Durations less than one second is now correct. It previously omitted
    the negative sign.
  • From<js_sys::Date> for OffsetDateTime now ensures sub-millisecond values are not erroneously
    returned.

v0.3.36

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Fixed
  • FormatItem can be used as part of an import path. See #​675 for details.

v0.3.35

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Added
  • Duration::checked_neg
  • ext::InstantExt, which provides methods for using time::Duration with std::time::Instant
Changed
  • Instant is deprecated. It is recommended to use std::time::Instant directly, importing
    time::ext::InstantExt for interoperability with time::Duration.
  • FormatItem has been renamed to BorrowedFormatItem, avoiding confusion with OwnedFormatItem.
    An alias has been added for backwards compatibility.
Fixed
  • The weekday is optional when parsing RFC2822.
  • The range of sub-second values in Duration is documented correctly. The previous documentation
    contained an off-by-one error.
  • Leap seconds are now correctly handled when parsing ISO 8601.

v0.3.34

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Fixed

Computing the local offset on Windows works again. It was broken in some cases in v0.3.32 and
v0.3.33.

v0.3.33

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Fixed

Builds targeting wasm32-unknown-unknown now work again.

v0.3.32

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Added
  • Methods to replace the day of the year.
    • Date::replace_ordinal
    • PrimitiveDateTime::replace_ordinal
    • OffsetDateTime::replace_ordinal
  • Modules to treat an OffsetDateTime as a Unix timestamp with subsecond precision for serde.
    • time::serde::timestamp::milliseconds
    • time::serde::timestamp::microseconds
    • time::serde::timestamp::nanoseconds
Changed
  • Duration::time_fn is deprecated.

v0.3.31

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Added
  • OffsetDateTime::new_in_offset
  • OffsetDateTime::new_utc
Changed
  • The valid range of UtcOffset has been expanded from ±23:59:59 to ±25:59:59. This is to support
    the full POSIX range while permitting infallible negation.

v0.3.30

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Added
  • powerfmt::smart_display::SmartDisplay has been added for the main types in the library. These
    implementations ensure that values follow the requested fill, width, and alignment when using
    format! or similar macros. Display is implemented in terms of SmartDisplay.
Fixed
  • Large values no longer wrap around in release mode when using NumericalDuration or
    NumericalStdDuration.

v0.3.29

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Added
  • Niche value optimization for Date has been added. Both Date and Option<Date> are four bytes.
  • Unit conversions have been added. It is now possible to write Second::per(Day), which returns
    the number of seconds in one day. See the types in the time::convert module for more
    information.
Changed
  • The diagnostic for --cfg unsound_local_offset has been removed.
  • #![feature(no_coverage)] was previously used internally for code coverage. It is no longer used,
    so it has been removed.
  • The default value for modifier::OffsetHour has been changed. This was unintentionally changed in
    v0.3.17 and went unnoticed until now. The sign is now only present if needed by default, as was
    the case previously. This does not affect any situation where format_description! or
    format_description::parse is used.
Fixed
  • Adding or subtracting a std::time::Duration to/from an OffsetDateTime will not result in
    integer overflow internally. It will still panic if the result is out of range.

v0.3.28

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Added
  • More additional constants for the well-known Iso8601 format description have been added. This
    avoids the need to manually configure the format.
  • An [end] component has been added. This is ignored during formatting, but is used to indicate
    the end of input when parsing. If any input remains after this component, an error is returned.
    This is useful when using the [first] component, as it avoids the need to reorder variants.
Changed
  • The exemption for MacOS introduced in 0.3.20 has been removed. This is because some supported
    versions of MacOS do not meet the requirements for the exemption.
  • The UnexpectedTrailingCharacters error variant has been moved to ParseFromDescription. All
    previously-existing locations of this variant have been deprecated and will no longer be returned.

v0.3.27

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This sets the serde dependency requirement to >= 1.0.184 where the binaries have been removed.

v0.3.26

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This release contains only a single change. serde is required to be a version prior to 1.0.171.
This is due to the decision by the maintainer of serde to include pre-built binaries that are
executed without the end user's knowledge. As of the time of publishing, the included binary has not
even been reproduced. This is a security risk, and the time project strongly opposes this
decision. While this may break some users' builds due to conflicting versions, it is a necessary
step to ensure the security.

v0.3.25

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Fixed
  • Methods such as Time::replace_milliseconds would panic on some out-of-range values. This has
    been fixed.

v0.3.24

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Added
  • The subsecond component is taken into account when parsing the unix_timestamp component. If
    data is conflicting, the subsecond value takes precedence.
  • Parsing a Time with only the hour component is now supported. The minute and second, and
    subsecond components are assumed to be zero.
Changed
  • The minimum supported Rust version is now 1.67.0.
  • The debug output for Parsed has been improved.
  • When parsing, invalid values are now rejected sooner. Previously, the entire input would be parsed
    before being rejected in the final step. Now, invalid values are rejected as soon as they are
    encountered. This affects the error variant returned, which may cause minor breakage for any code
    (incorrectly) relying on the exact error variant.
  • When parsing a Time, an error is returned if components are present but not consecutive. For
    example, if hours and seconds are present, minutes will not be assumed to be zero.
Fixed
  • The implementation of Duration::checked_div could return a slightly incorrect result in some
    cases. This has been fixed.

v0.3.23

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Added
  • Date::next_occurrence
  • Date::prev_occurrence
  • Date::nth_next_occurrence
  • Date::nth_prev_occurrence
  • Weekday::nth_prev
  • Month::nth_next
  • Month::nth_prev
Changed

The minimum supported Rust version policy has been updated. See the README for
details.

Fixed
  • Duration::abs correctly returns Duration::MAX when near the minimum value. The nanoseconds
    value was previously incorrect.
  • Compliance with ISO 8601 has been improved. Previously, a UTC offset would be incorrectly rejected
    in some cases.

v0.3.22

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Added
  • OffsetDateTime::checked_to_offset

v0.3.21

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Added
  • Any formattable/parsable type can now be used with the time::serde::format_description! macro.
  • Weekday::nth_next
Changed
  • The minimum supported Rust version is now 1.65.0.

v0.3.20

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Changed
  • The minimum supported Rust version is now 1.63.0.
  • On Unix-based operating systems with known thread-safe environments, functions obtaining the local
    offset no longer require a check that the program is single-threaded. This currently includes
    MacOS, illumos, and NetBSD.
Added
  • [ignore] component in format descriptions. A count modifier is required, indicating the number
    of bytes to ignore when parsing.
  • [unix_timestamp] component in format descriptions. This is currently only usable with
    OffsetDateTime. Users can choose between seconds, milliseconds, microseconds, and nanoseconds,
    and whether the sign is mandatory or optional.
Fixed
  • The API for declaring soundness now uses stricter atomic orderings internally.

v0.3.19

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Fixed

This includes the update to the format_description! macro, which was supposed to be included in
0.3.18.

v0.3.18

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Changed
  • The minimum supported Rust version is now 1.62.0.
Added
  • [first] and [optional] items can now be included in format descriptions. To parse this at
    runtime, you must use the format_description::parse_owned method.
  • format_description::parse_borrowed
  • An API has been added to opt out of soundness checks for obtaining the local offset. This replaces
    the previous, officially unsupported RUSTFLAGS="--cfg unsound_local_offset". End users may call
    time::util::local_offset::set_soundness(time::util::local_offset::Soundness::Unsound). This
    method is unsafe because it enables undefined behavior if its safety requirements are not
    upheld. Note that libraries must not set this to Unsound, as it is impossible for a library
    to guarantee end users uphold the required invariants.
Fixed
  • Correctly parse offset sign when hour is zero. The parse was previously unconditionally positive,
    even if the sign indicated otherwise.
  • Compilation is fixed for WebAssembly.

v0.3.17

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Changed
  • The amount of code generated by time::serde::format_description! is reduced if not all feature
    flags are active.
  • cargo test --tests works with any configuration of feature flags. This occurs by spawning a
    subprocess that passes --all-features. cargo test --doc works with most combinations of
    feature flags, including the default. The combination of these changes means that crater will now
    run on time.
  • libc and num_threads are only included as dependencies when needed. They were previously
    unconditionally included.
Added
  • time::format_description::parse_owned, which returns an OwnedFormatItem. This avoids "lifetime
    hell", where all your structs now need a lifetime because a single field has one. Note that when
    possible, the borrowed format item (just called FormatItem) is still preferred, as it has
    significantly fewer allocations. The new OwnedFormatItem is usable for both formatting and
    parsing, as you would expect.
Compatibility
  • The parser for runtime format descriptions has been rewritten. A side effect of this is that some
    errors have slightly changed. No existing API has been altered, so this is not a breaking change.
    However, you may notice different errors, which are hopefully better! The parser for compile-time
    format descriptions has not yet been swapped out. If you notice any bugs, please file an issue.

v0.3.16

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Changed
  • The minimum supported Rust version is now 1.60.0.
  • The serde-well-known feature flag is deprecated. The necessary features for an item to be
    enabled are indicated in documentation.
  • Feature gates have been loosened for well-known formats.
Added
  • consts can now be provided as the format description for time::serde::format_description!. The
    const must be of type &[FormatItem<'_>], which is what is returned by the
    time::macros::format_description! macro.

    const TIME_FORMAT_ALT: &[FormatItem<'_>] = time::macros::format_description!("[hour]:[minute]");
    time::serde::format_description!(time_format_alt, Time, TIME_FORMAT_ALT);
Compatibility
  • Some feature flags have been removed. None of these have ever been documented as flags, so any use
    was unsupported. These flags are:
    • js-sys
    • quickcheck-dep
    • itoa
    • time-macros

v0.3.15

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Changed
  • Better gating for tm_gmtoff extension. This should eliminate build failures on some untested
    platforms.
  • Debug output for types are now human-readable. While this should not be relied upon, it is
    currently the same as the output with Display.
  • Eliminate overflows in the constructors for `Duration. When there is an overflow, the methods now
    panic. This was previously only the case in debug mode.
  • Panic if NaN is passed to Duration::from_secs_f32 or Duration::from_secs_f64.
Fixed
  • Fix error when deserializing data types from bytes. This affects formats such as JSON.
  • Eliminate a panic in an edge case when converting OffsetDateTime to another UtcOffset. This
    occurred due to an old assumption in code that was no longer the case.

v0.3.14

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Changed
  • The minimum supported Rust version is now 1.59.0.
  • Duration::unsigned_abs is now const fn.
  • The const parameter for time::format_description::well_known::Iso8601 now has a default. This
    means Iso8601 is the same as Iso8601::DEFAULT.
  • The Parsed struct has been reduced in size from 56 to 32 bytes (a 43% reduction).

v0.3.13

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Fixed
  • wasm builds other than those using wasm-bindgen work again.

v0.3.12

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Added
  • js-sys now supports obtaining the system's local UTC offset.
Changed
  • Performance of many Date operations has improved when using the large-dates feature.
  • While an internal change, OffsetDateTime now stores the value in the attached UtcOffset, not
    UTC. This leads to significant performance gains on nearly all OffsetDateTime methods.
Fixed
  • Subtracting two Times can no longer panic. This previously occurred in some situations where the
    result was invalid.
  • ISO 8601 parsing rounds the subseconds to avoid incorrectly truncating the value.

v0.3.11

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Fixed
  • #​479: regression when parsing optional values with serde
  • #​481: Time subtracted from Time can panic. This was caused by a bug that has always existed,
    in that an internal invariant was not upheld. Memory safety was not violated.

v0.3.10

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Added
  • Serde support for non-self-describing formats
  • Duration::unsigned_abs, which returns a std::time::Duration
  • ISO 8601 well-known format
  • Duration can now be formatted with a .N specifier, providing a shorter representation when
    using Display.
  • Parse null as None on serde structs
Fixed
  • Fix incorrect parsing of UTC offset in Rfc3339.
Changed
  • The minimum supported Rust version is now 1.57.0.
  • Performance for Rfc2822 has been improved.
  • Debug assertions have been added in a few places. This should have no user facing impact, as it
    only serves to catch bugs and is disabled in release mode.

v0.3.9

Added
  • time::serde::format_description!
    • This macro is similar to time::format_description!, but it generates a module that can be used
      in #[serde(with = "foo")]. This makes it far easier to serialize/deserialize a custom format.
  • Date::replace_year
  • Date::replace_month
  • Date::replace_day
  • Time::replace_hour
  • Time::replace_minute
  • Time::replace_second
  • Time::replace_millisecond
  • Time::replace_microsecond
  • Time::replace_nanosecond
  • PrimitiveDateTime::replace_year
  • PrimitiveDateTime::replace_month
  • PrimitiveDateTime::replace_day
  • PrimitiveDateTime::replace_hour
  • PrimitiveDateTime::replace_minute
  • PrimitiveDateTime::replace_second
  • PrimitiveDateTime::replace_millisecond
  • PrimitiveDateTime::replace_microsecond
  • PrimitiveDateTime::replace_nanosecond
  • OffsetDateTime::replace_year
  • OffsetDateTime::replace_month
  • OffsetDateTime::replace_day
  • OffsetDateTime::replace_hour
  • OffsetDateTime::replace_minute
  • OffsetDateTime::replace_second
  • OffsetDateTime::replace_millisecond
  • OffsetDateTime::replace_microsecond
  • OffsetDateTime::replace_nanosecond
  • Parsed::offset_minute_signed
  • Parsed::offset_second_signed
  • Parsed::set_offset_minute_signed
  • Parsed::set_offset_second_signed
  • Parsed::with_offset_minute_signed
  • Parsed::with_offset_second_signed
  • error::InvalidVariant
  • impl FromStr for Weekday
  • impl FromStr for Month
  • impl Display for Duration
Deprecated

The following methods have been deprecated in favor of the new, signed equivalent methods. The
pre-existing methods

  • Parsed::offset_minute
  • Parsed::offset_second
  • Parsed::set_offset_minute
  • Parsed::set_offset_second
  • Parsed::with_offset_minute
  • Parsed::with_offset_second
Changed
  • Well-known formats that support leap seconds now return the TryFromParsed::ComponentRange error
    variant if the leap second could not occur at that given moment.

v0.3.8

This release is broken and has been yanked.

v0.3.7

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Fixed

Solaris and Illumos build again.

v0.3.6

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Added
  • Date::saturating_add
  • Date::saturating_sub
  • PrimitiveDateTime::saturating_add
  • PrimitiveDateTime::saturating_sub
  • OffsetDateTime::saturating_add
  • OffsetDateTime::saturating_sub
  • PrimitiveDatetime::MIN
  • PrimitiveDatetime::MAX
  • Rfc2822 format description
  • Serde support for well-known formats
    • This is placed behind the new serde-well-known feature flag.
Changed
  • MacOS and FreeBSD are supported obtaining the local offset when single-threaded.
    • Starting with this version, this is delegated to the num_threads crate.
  • Leap seconds are now parsed as the final nanosecond of the preceding second.
  • The minimum supported Rust version is now 1.53.0.
  • Deserializers for human readable formats will fall back to the binary format if the human readable
    format fails to deserialize.
Fixed
  • Deserialization will no longer fail when given a non-borrowed string.

Configuration

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