# kizitonwose/Calendar

A highly customizable calendar view and compose library for Android and Kotlin Multiplatform.

Repository: https://github.com/kizitonwose/Calendar
Canonical: https://ross.abutalabs.com/products/calendar
Language: Kotlin
License: MIT
License Family: permissive
Topics: calendar, calendarview, date, datepicker, compose, compose-calendar, android, heatmap-calendar, month-calendar, week-calendar, date-range-picker, date-range, kotlin, year-calendar, calendar-library, compose-calendar-library, compose-multiplatform, kotlin-multiplatform, kmp, kmp-library
Last push: 2026-08-13T09:41:50+00:00

## Health v2 (maintenance only)
Score: 86/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 97, release rhythm 65, longevity 100
- inputs: {"age_days": 2692, "days_push": 20, "days_rel": 158, "gap_med": 67.5, "n_releases_24m": 9}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 5587, forks 581 (observed 2026-08-28T04:09:22.629828+00:00)

## What it is
A highly customizable calendar library for Android (view system via RecyclerView) and Compose Multiplatform (via LazyRow/LazyColumn). It provides calendar logic while you supply fully custom day cells and calendar views, supporting week, month, and year modes.

## Use cases
- build a date picker in an Android app
- create a month or week calendar view in Jetpack Compose
- implement a date range picker for booking flows
- show a GitHub-style contribution heatmap calendar
- build a shared calendar UI across Android and iOS with Kotlin Multiplatform
- disable specific dates and limit the selectable date range

## When to choose
- you need full control over calendar appearance with custom day cells and layouts
- you need week, month, or year calendar modes with single, multiple, or range selection
- you want one calendar library for both Android views and Compose Multiplatform
- you need a heatmap calendar like GitHub's contribution graph

## When to avoid
- you want a pre-styled drop-in Material date picker with no customization
- your project is not Android or Kotlin Multiplatform based
- you need a web or desktop-only calendar outside the Kotlin ecosystem

## Facets
- artifact type: library
- maturity: active
- function: ui-components, date-time
- domain: mobile-development, cross-platform, frontend
- platform: jvm
- tags: calendar, compose-multiplatform, datepicker, kotlin-multiplatform, heatmap-calendar, date-range-picker, recyclerview, android

## Member repositories
- kizitonwose/Calendar (main) score 86

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:09:22.629828+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 2026-08-29T17:55:32.121514+00:00, confidence not recorded.
  - readme: https://github.com/kizitonwose/Calendar (fetched 2026-08-28T04:09:22.629828+00:00, sha 47d0e1743f0f)
- Data as of 2026-08-30T08:39:29.467469+00:00.