js-joda/js-joda

Health v2 · maintenance only

Flags: no_license

Adoption not part of the score

1664 stars · 131 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

js-joda is an immutable date and time library for JavaScript, ported from the Java threeten-backport (JSR-310 / java.time). It provides a domain-driven API with classes like LocalDate, LocalTime, LocalDateTime, and ZonedDateTime, with built-in ISO 8601 parsing and formatting.

Use cases

• handle dates without times like birthdays or holidays safely
• parse and format ISO 8601 / RFC 3339 date strings
• work with timezone-aware date-times in JavaScript
• use immutable date objects in React or Flux apps
• replace moment.js with a faster standalone date library
• persist dates to a server without timezone ambiguity

When to choose

• you need a standalone date-time implementation not wrapping native Date
• you want immutability and a domain-driven API like java.time
• performance matters - it is 2-10x faster than other date libraries
• you need robust ISO 8601 parsing and formatting

When to avoid

• you only need trivial date formatting and prefer a tiny wrapper around native Date
• you need non-ISO calendar systems like Hijri or Buddhist calendars
• your project already uses Temporal API support in modern runtimes

Facets

library · maturity stable

date-time parser serialization developer-tools web-development browser cross-platform immutable iso-8601 timezone threeten joda javascript localization nodejs

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