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Alternatives · Dates & times

Alternatives to org.threeten:threeten-extra on Maven

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

Cross-language equivalents
npm· JavaScript
date-fnsv4.4.0
npm

Modern JavaScript date utility library

MaintenanceHealthy
PopularityUnknown
SecurityClean
DepsZero deps
Maintained. Maintained, actively maintained.
dayjsv1.11.21
npm

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

MaintenanceHealthy
PopularityUnknown
SecurityClean
DepsZero deps
Maintained. Maintained, actively maintained.
luxonv3.7.2
npm

Immutable date wrapper

MaintenanceAging
PopularityUnknown
SecurityClean
DepsZero deps
Aging — last published 9 months ago — check before adopting.
PyPI· Python
arrowv1.4.0
PyPI

Better dates & times for Python

MaintenanceAging
PopularityUnknown
SecurityClean
DepsHeavy
Aging — last published 7 months ago — check before adopting.
pendulumv3.2.0
PyPI

Python datetimes made easy

MaintenanceHealthy
PopularityTop 1%
SecurityClean
DepsLean
Safe default. Widely trusted across the ecosystem, actively maintained.
crates.io· Rust
chronov0.4.44
crates.io

Date and time library for Rust

MaintenanceHealthy
PopularityTop 1%
SecurityClean
DepsZero deps
Safe default. Widely trusted across the ecosystem, actively maintained.
timev0.3.47
crates.io

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

MaintenanceHealthy
PopularityTop 1%
SecurityClean
DepsZero deps
Safe default. Widely trusted across the ecosystem, actively maintained.
RubyGems· Ruby
activesupportv8.1.3
RubyGems

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
SecurityClean
DepsZero deps
Solid choice. Well-adopted and active, actively maintained.
NuGet· .NET
nodatimev3.3.2
NuGet

No description provided.

MaintenanceHealthy
PopularityUnknown
SecurityClean
DepsZero deps
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.