Calendar Open Source Projects

A collective list of free APIs

☁️ Nextcloud server, a safe home for all your data

Full-sized drag & drop event calendar in JavaScript

Easy and Repeatable Kubernetes Development

A curated list of free public APIs — searchable, community-maintained, with a free JSON API.

:octocat: A collection of APIs

🍞📅A JavaScript calendar that has everything you need.

An easily internationalizable, mobile-friendly datepicker library for the web

Leantime is a goals focused project management system for non-project managers. Building with ADHD, Autism, and dyslexia in mind.

A fully customizable iOS calendar library, compatible with Objective-C and Swift

React Native Calendar Components 🗓️ 📆

RecyclerView? ListView or ViewGroup? No, it's Canvas! Ultra performance and free customization interface! Vertical and horizontal, Fast rendering and extremely low memory. Android上一个优雅、万能自定义UI、仿iOS、自定义动画，支持垂直、水平方向切换、支持周视图、自定义周起始、性能高效的日历控件，热插拔实现UI定制！Canvas绘制，渲染速度快、占用内存低，你真的想不到日历居然还可以如此优雅。

:cloud: ownCloud web server core (Files, DAV, etc.)

告别枯燥，致力于打造 Python 实用小例子，更多Python良心教程见 https://ai-jupyter.com

🐔 Toolkit to parse, validate, manipulate, compare and display dates, time & timezones in Swift.

The Unofficial Apple iOS Swift Calendar View. Swift calendar Library. iOS calendar Control. 100% Customizable

The mobile-friendly, responsive, and lightweight jQuery date & time input picker.

DayPicker is a customizable date picker component for React. Add date pickers, calendars, and date inputs to your web applications.

🍀 Local git statistics including GitHub-like contributions calendars.

A Material design back port of Android's CalendarView

Stop relying on GUI; CLI **ROCKS**

Universal API for request permission and get its statuses.

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

🇺🇦 Your meetings at your fingertips in the macOS menu bar

Apps Script samples for Google Workspace products.

Make a cascading timeline from markdown-like text. Supports simple American/European date styles, ISO8601, images, links, locations, and more.

An elegant calendar and datepicker plugin for Vue.

Standalone Android widget for picking a single date from a calendar view.

:date: Easy!Appointments - Self Hosted Appointment Scheduler

✨ Infinite scrolling date-picker built with React, with localization, range selection, themes, keyboard support, and more.

Date and time library for Rust

tap + haiku = tapku, a well crafted open source iOS framework

Ultimate calendar for your React app.

Google Calendar Command Line Interface

JavaScript library for working with recurrence rules for calendar dates as defined in the iCalendar RFC and more.

A simple calendar with events, tasks, customizable colors, widgets and no ads.

Gantt Gantt Gantt Timeline Schedule Calendar [ javascript gantt, js gantt, projects gantt, timeline, scheduler, gantt timeline, reservation timeline, react gantt, angular gantt, vue gantt, svelte gantt, booking manager ]

A custom visual calendar for iOS 8+ written in Swift (>= 4.0).

Android Week View is an android library to display calendars (week view or day view) within the app. It supports custom styling.

A date and time library based on the C++11/14/17 <chrono> header

Baïkal is a Calendar+Contacts server

EspoCRM – Open Source CRM Application

A declarative, performant, iOS calendar UI component that supports use cases ranging from simple date pickers all the way up to fully-featured calendar apps.

Cal-Heatmap is a javascript charting library to create a time-series calendar heatmap

:calendar: CLI calendar application

Full view calendar with year, month, week and day views based on templates with Twitter Bootstrap.

:calendar: Customizable date (and time) picker. Opt-in UI, no jQuery!

Lightweight, dependency-free JavaScript datepicker.

:calendar: a jQuery calendar plugin that uses HTML templates

A Python + iCloud wrapper to access iPhone and Calendar data.

A flexible calendar component for angular 20.2+ that can display events on a month, week or day view.

@Deprecated android 自定义日历控件 支持左右无限滑动 周月切换 标记日期显示 自定义显示效果跳转到指定日期

A customizable calendar view for iOS.

📅 Calendar for Apple platforms in Swift

A simple Vue.js datepicker component. Supports disabling of dates, inline mode, translations

Android open source calendar

JavaScript event calendar. Modern alternative to fullcalendar and react-big-calendar.

The official React Component for FullCalendar

微信小程序－日历组件 📅

Robust and type-safe date and time calculations for Swift