# commenthol/date-holidays

worldwide holidays

Repository: https://github.com/commenthol/date-holidays
Canonical: https://ross.abutalabs.com/products/date-holidays
Homepage: https://commenthol.github.io/date-holidays/
Language: JavaScript
License: NOASSERTION
License Family: other
Topics: holidays, holiday-api, holidays-ical, countries, region, javascript, world
Last push: 2026-08-25T04:50:09+00:00

## Health v2 (maintenance only)
Score: 77/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 99, release rhythm 35, longevity 100
- inputs: {"age_days": 3897, "days_push": 8, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1097, forks 304 (observed 2026-08-28T04:03:34.717678+00:00)

## What it is
A JavaScript library that calculates public, bank, and observance holidays for 206 countries, their states and regions, with timezone awareness and multi-language holiday names. It supports Gregorian, Islamic, Hebrew, and Chinese calendars and can generate custom holiday rules.

## Use cases
- check if a date is a public holiday in a specific country
- get holidays for a state or region with timezone handling
- generate holiday calendars for HR and payroll systems
- localize holiday names in multiple languages
- build an iCal holiday calendar feed
- add custom company holidays alongside official ones

## When to choose
- you need worldwide holiday data covering many countries and subdivisions
- you need timezone-aware holiday start/end times
- you need multi-language holiday names or custom holiday rules in JavaScript

## When to avoid
- you need exact Islamic holiday dates, which depend on moon sighting
- you need a hosted holiday API rather than an embeddable library
- your stack is not JavaScript/Node.js

## Facets
- artifact type: library
- maturity: active
- function: date-time, internationalization, sdk
- domain: developer-tools, apis
- platform: browser, cross-platform
- tags: holidays, calendar, ical, timezone-aware, worldwide, localization, nodejs, javascript

## Member repositories
- commenthol/date-holidays (main) score 77

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:03:34.717678+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 2026-08-30T06:46:23.958038+00:00, confidence not recorded.
  - readme: https://github.com/commenthol/date-holidays (fetched 2026-08-28T04:03:34.717678+00:00, sha 55a8a4b43352)
  - homepage: https://commenthol.github.io/date-holidays/ (fetched 2026-08-29T12:49:41.285743+00:00, sha d87d6863f2d1)
- Data as of 2026-08-30T08:39:29.467469+00:00.