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Alternatives · Dates & times

Alternatives to chrono on crates.io

For parsing, formatting and arithmetic on timestamps. Below are packages that fill the same role — on crates.io, and across other ecosystems.

crates.io In crates.io

Date and time library. Fully interoperable with the standard library. Mostly compatible with #![no_std].

MaintenanceHealthy

PopularityTop 1%

Safe default. Widely trusted across the ecosystem, actively maintained.

Cross-language equivalents

npm· JavaScript

Modern JavaScript date utility library

MaintenanceHealthy

PopularityTop 1%

Safe default. Widely trusted across the ecosystem, actively maintained.

2KB immutable date time library alternative to Moment.js with the same modern API

MaintenanceHealthy

PopularityTop 1%

Safe default. Widely trusted across the ecosystem, actively maintained.

Immutable date wrapper

MaintenanceAging

PopularityTop 1%

Aging — last published 9 months ago — check before adopting.

PyPI· Python

Better dates & times for Python

MaintenanceAging

PopularityTop 1%

Aging — last published 7 months ago — check before adopting.

Python datetimes made easy

MaintenanceHealthy

PopularityTop 1%

Safe default. Widely trusted across the ecosystem, actively maintained.

RubyGems· Ruby

activesupportv8.1.3

A toolkit of support libraries and Ruby core extensions extracted from the Rails framework. Rich support for multibyte strings, internationalization, time zones, and testing.

MaintenanceHealthy

PopularityWidely used

Solid choice. Well-adopted and active, actively maintained.

Maven· Java

org.threeten:threeten-extrav1.9.0

No description provided.

MaintenanceHealthy

PopularityUnknown

Maintained. Maintained, actively maintained.

NuGet· .NET

No description provided.

MaintenanceHealthy

PopularityUnknown

Maintained. Maintained, actively maintained.

These suggestions come from a hand-curated concept map of canonical packages per role. They’re intentionally narrow — only widely-adopted packages in each category. Phase 5 will add AI-generated alternatives.