Sourced from time's releases.

v0.3.49

See the changelog for details.

v0.3.48

See the changelog for details.

Sourced from time's changelog.

0.3.49 [2026-06-13]

Fixed

• Due to a long-standing bug in the Rust compiler, v0.3.48 caused a number of crates to stop compiling. A patch has been added that avoids triggering the bug.

0.3.48 [2026-06-12] [YANKED]

Security

• The number of digits parsed by [subsecond digits:1+] is capped at 32 to avoid parsing unbounded user input. Digits after the 9th have no semantic meaning.
• Explicitly specify #[repr] for Weekday. The value of the variants is relied upon in multiple locations for soundness. The practical effect of this change is nothing, as Rust has always mapped C-like enums to 0..N in memory.

Compatibility

• Non-UTF-8 formatting and parsing is deprecated without replacement. It is recommended to only format and parse valid UTF-8.
• format_description::parse is deprecated. It is recommended to use format_description::parse_borrowed::<3> or format_description::parse_owned::<3>.

Added

• All types in the unit module have a generic parameter, though this is currently not used for much. Usage will be expanded in the future.
• Comparisons between types in the unit module and the generic Unit type are permitted.
• Support for rand 0.10
• Version 3 format descriptions
  • Only UTF-8 is supported. As a side effect of this, [ignore] requires that the remaining input not begin mid-codepoint.
  • Representation is deliberately opaque to allow for arbitrary changes going forward.
  • format:false is supported on [optional] components. This is not possible in version 1 and version 2 format descriptions due to API compatibility.
  • The time::serde::format_description! macro uses a new, clearer syntax for version 3.
    • time::serde::format_description!(mod foo [Date] = "[year]-[month]-[day]");
    • Unlike version 1 and version 2 format descriptions, the type is not automatically brought into scope. You must import it yourself.
  • Nonsensical combinations of modifiers are rejected. For example, you cannot specify case-sensitivity when parsing a numerical month.
  • [year] defaults to range:standard
  • Components and modifiers are case sensitive (and always lowercase).

Changed

• The convert module has been renamed to unit.

Fixed

... (truncated)

• ff8683c v0.3.49 release
• f189886 fix: resolve E0119 trait coherence error in rustc >= 1.95.0
• 5d8737c v0.3.48 release
• 1bfca87 Use widen instead of extend in sys code
• c57284f fix: return error instead of panicking on truncated strftime padding modifier
• a74f35f Use v3 format descriptions for serde defaults
• 96ff36c Allow eliding serde format description version
• edc58b1 Permit duplicates in v1/v2 in permit_modifiers!
• a838f69 Bump codecov action
• f2f99f8 Fix unused warning
• Additional commits viewable in compare view

Sourced from time-core's changelog.

Changelog

All notable changes to the time project will be documented in this file.

The format is based on [Keep a Changelog]. This project adheres to [Semantic Versioning].

---

0.3.49 [2026-06-13]

Fixed

• Due to a long-standing bug in the Rust compiler, v0.3.48 caused a number of crates to stop compiling. A patch has been added that avoids triggering the bug.

0.3.48 [2026-06-12] [YANKED]

Security

• The number of digits parsed by [subsecond digits:1+] is capped at 32 to avoid parsing unbounded user input. Digits after the 9th have no semantic meaning.
• Explicitly specify #[repr] for Weekday. The value of the variants is relied upon in multiple locations for soundness. The practical effect of this change is nothing, as Rust has always mapped C-like enums to 0..N in memory.

Compatibility

• Non-UTF-8 formatting and parsing is deprecated without replacement. It is recommended to only format and parse valid UTF-8.
• format_description::parse is deprecated. It is recommended to use format_description::parse_borrowed::<3> or format_description::parse_owned::<3>.

Added

• All types in the unit module have a generic parameter, though this is currently not used for much. Usage will be expanded in the future.
• Comparisons between types in the unit module and the generic Unit type are permitted.
• Support for rand 0.10
• Version 3 format descriptions
  • Only UTF-8 is supported. As a side effect of this, [ignore] requires that the remaining input not begin mid-codepoint.
  • Representation is deliberately opaque to allow for arbitrary changes going forward.
  • format:false is supported on [optional] components. This is not possible in version 1 and version 2 format descriptions due to API compatibility.
  • The time::serde::format_description! macro uses a new, clearer syntax for version 3.
    • time::serde::format_description!(mod foo [Date] = "[year]-[month]-[day]");
    • Unlike version 1 and version 2 format descriptions, the type is not automatically brought into scope. You must import it yourself.
  • Nonsensical combinations of modifiers are rejected. For example, you cannot specify case-sensitivity when parsing a numerical month.

... (truncated)

• See full diff in compare view

• See full diff in compare view