# JakeWharton/ThreeTenABP

An adaptation of the JSR-310 backport for Android.

Repository: https://github.com/JakeWharton/ThreeTenABP
Canonical: https://ross.abutalabs.com/products/threetenabp
Language: Java
License: Apache-2.0
License Family: permissive
Archived: true
Last push: 2025-08-22T03:29:53+00:00

## Health v2 (maintenance only)
Score: 10/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 38, release rhythm 35, longevity 100
- inputs: {"age_days": 4079, "days_push": 376, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, archived
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 3542, forks 140 (observed 2026-08-28T04:08:09.250067+00:00)

## What it is
An Android adaptation of the JSR-310 (java.time) backport that loads timezone data efficiently from Android assets instead of JAR resources. Development has concluded in favor of java.time with core library desugaring.

## Use cases
- use java.time API on old Android versions
- avoid slow timezone loading from ThreeTenBP on Android
- replace Date and Calendar with modern date-time API
- reduce method count compared to Joda-Time
- initialize timezone data in an Android app

## When to choose
- maintaining a legacy Android project with minSdk below 26 that cannot use desugaring
- existing codebase already depends on ThreeTenABP

## When to avoid
- starting a new Android project (use java.time with core library desugaring)
- minSdk 26+ where java.time is available natively
- non-Android Java projects (use ThreeTenBP instead)

## Facets
- artifact type: library
- maturity: maintenance
- function: date-time
- domain: android-tools, developer-tools
- platform: jvm
- tags: jsr-310, java-time, timezone, backport, deprecated-in-favor-of-desugaring, android

## Member repositories
- JakeWharton/ThreeTenABP (main) score 10

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:09.250067+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T18:34:27.526284+00:00, confidence not recorded.
  - readme: https://github.com/JakeWharton/ThreeTenABP (fetched 2026-08-28T04:08:09.250067+00:00, sha 249abaa4ae6c)
- Data as of 2026-08-30T08:39:29.467469+00:00.