# datejs/Datejs

A JavaScript Date and Time Library

Repository: https://github.com/datejs/Datejs
Canonical: https://ross.abutalabs.com/products/datejs
Language: JavaScript
License: NOASSERTION
License Family: other
Archived: true
Last push: 2020-05-29T04:15:16+00:00

## Health v2 (maintenance only)
Score: 10/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 5984, "days_push": 2287, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, archived, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1886, forks 467 (observed 2026-08-28T04:05:49.065405+00:00)

## What it is
Datejs is an open-source JavaScript library for parsing, formatting, and processing dates and times, with support for 150+ cultures. It provides a fluent, chainable API for date manipulation such as relative dates, comparisons, and arithmetic.

## Use cases
- parse human-readable date strings in javascript
- format dates for different locales and cultures
- compute relative dates like next friday or three months ago
- add and subtract days, months, or years from dates
- check whether a date is a weekday or specific month
- convert between php/unix date formats and javascript

## When to choose
- you need natural-language date parsing with strong culture/locale support in a legacy javascript project
- you want a lightweight, dependency-free date utility with a fluent chainable api

## When to avoid
- you are starting a new project and need actively maintained software
- you need timezone-aware date handling (use a modern library like date-fns, Luxon, or Day.js)
- you need modern ES module or TypeScript support

## Facets
- artifact type: library
- maturity: abandoned
- function: date-time, parser, internationalization
- domain: web-development, frontend
- platform: browser, cross-platform
- tags: date-parsing, date-formatting, fluent-api, cultures, javascript, localization, nodejs

## Member repositories
- datejs/Datejs (main) score 10

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:49.065405+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 2026-08-30T03:13:34.616345+00:00, confidence not recorded.
  - readme: https://github.com/datejs/Datejs (fetched 2026-08-28T04:05:49.065405+00:00, sha 949ec4ee841c)
- Data as of 2026-08-30T08:39:29.467469+00:00.