Open-source alternatives to JTAppleCalendar

Ark is a headless UI component library that delivers accessible, cross-framework primitives with behavior governed by finite state machines. It provides unstyled components that encapsulate logic and accessibility — including full keyboard navigation, focus management, and WAI-ARIA support — while leaving visual styling entirely to the consumer. Components expose scoped data attributes for CSS targeting and use state machines to produce predictable, testable interactive behavior across every state transition. The library distinguishes itself through a state propagation model that distributes

This project is a comprehensive collection of high-performance UI components and SDKs designed for building data-rich, cross-platform applications in Flutter. It provides a unified library of modular widgets and processing tools that enable developers to implement complex interface requirements, including advanced scheduling, tabular data management, and interactive data visualization, using a consistent declarative architecture. The library distinguishes itself through specialized, enterprise-grade capabilities that extend beyond standard UI elements. It includes a robust document processing

This project provides a set of customizable calendar and date-picking interfaces for cross-platform mobile applications. It includes an interactive date grid and a date picker interface used for selecting single dates or date ranges. The components support localized date displays, allowing month names and date formatting to adapt to different languages and regional settings. Users can navigate months via a scrollable grid and mark specific days with custom highlights or indicators to signify events and status. The library covers date selection constraints to block specific dates and a select

Flatpickr is a lightweight, dependency-free JavaScript library designed to provide a modular date and time selection interface for web applications. It functions as a versatile web component that integrates into existing forms, offering a consistent user experience for picking single dates, ranges, or multiple values while maintaining a clear separation between human-readable display strings and machine-readable data. The library distinguishes itself through a robust configuration-driven architecture that allows for dynamic runtime updates and extensive customization of date formatting via a

Android Times Square is a date selection library and UI component for Android applications. It provides a customizable calendar widget used for managing date selections and validating dates within a mobile interface. The library supports various selection modes, including single date picking, date range selection, and the selection of multiple specific dates. It includes tools for applying custom themes, configuring typefaces, and utilizing cell decorators to modify the appearance and behavior of individual date cells. The component handles regional localization, including support for right-

This is a JavaScript date and time selector and a jQuery-based component used to capture single dates or date ranges through a calendar dropdown interface. It serves as a web-based tool for selecting specific days along with hours and minutes for scheduling and data filtering. The project includes support for regional date localization, allowing date displays and labels to be translated and formatted to match different languages and regional requirements. The component provides capabilities for input validation through date constraints and the definition of selectable time windows. Users can

FSCalendar is a native iOS user interface library and customizable date picker designed for integration into mobile applications. It provides a reusable calendar component that supports both Swift and Objective-C. The library allows for the creation of custom calendar cell designs and supports date selection through swiping gestures, enabling both single and multiple date selection workflows. The component can be configured via Interface Builder for visual layout design. It includes capabilities for rendering calendar views and implementing custom date picker designs to match specific applic

react-calendar is a customizable date grid and picker for React applications. It provides an interactive interface for selecting single or multiple dates and navigating between months and years. The component uses browser internationalization APIs to format months and days, enabling multilingual date formatting for different global regions. It allows for external customization through prop-driven render overrides to replace default date cell displays. The library handles the underlying date calculations and state-driven navigation required for scheduling interfaces and date-based grids.

react-big-calendar is a programmable grid component for React applications used to render professional calendars and interactive scheduling interfaces. It provides a visual system for managing and visualizing appointments and events through daily, weekly, and monthly grid views. The component is designed to be localizable and themeable, allowing for customized event visualization and date formats that match specific linguistic and cultural preferences. It utilizes a date-library agnostic interface, decoupling core logic from specific time-handling libraries via an adapter layer. The project

react-big-calendar is a React calendar component used to build scheduling interfaces for web applications. It provides layouts for displaying events in daily, weekly, and monthly views, acting as a customizable UI component for managing appointments and schedules. The project includes a resource scheduling grid for tracking multiple events across different entities and a drag and drop scheduler that allows users to move and resize events through pointer-based interactions. The interface supports localized date scheduling and date formatting localization. Visual appearance is managed through

A Material design back port of Android's CalendarView

AndroidPicker is a collection of customizable UI selection interfaces for Android applications. The library provides specialized components for selecting geographic addresses, calendar dates, clock times, local files, and numeric values. The library features a wheel-based input mechanism for choosing measurements and a hierarchical selection system for mapping provinces, cities, and districts. It includes cascading selection logic where choices in one picker dynamically filter available options in subsequent levels. The capability surface covers date and time picking through grid views, loca

Pikaday is a lightweight JavaScript datepicker library and client-side date input manager. It provides a standalone calendar interface for selecting dates in web applications as a zero-dependency UI component that operates without external frameworks or libraries. The tool features a modular CSS architecture that separates structural logic from visual presentation, allowing for flexible customization of the calendar layout. It includes built-in support for calendar localization, enabling the update of month names and weekday labels to match specific languages or regions. The library manages

react-big-calendar is a React calendar component used for rendering schedules and time-based events within web applications. It functions as a customizable event scheduler and JavaScript date visualization library that maps scheduled activities to a time-grid layout. The project is a date-agnostic scheduling interface, utilizing a pluggable adapter to support various third-party JavaScript date libraries. It allows for the replacement of internal calendar elements with custom React components and employs SASS variables for visual styling. The library covers interactive event scheduling and t

This is a date picker component for React that features a continuous vertical scrolling interface. It provides a web interface for choosing dates, supporting both individual date selection and the definition of specific time periods through range selection. The component is distinguished by an infinite scroll mechanism that allows users to browse dates without pagination or dropdowns. It includes year navigation to jump rapidly between different years and utilizes windowed virtual scrolling to maintain performance. The interface supports regional localization for labels and date formats. It

React-admin is a framework for building data-driven administrative interfaces that connect to REST or GraphQL backends. It provides a comprehensive suite of tools for managing the full lifecycle of administrative applications, including resource-oriented routing, declarative form scaffolding, and context-driven state management. By utilizing a modular adapter-based architecture, the framework abstracts backend communication, allowing developers to build consistent CRUD interfaces that handle data fetching, authentication, and synchronization automatically. The project distinguishes itself thr

A nicer iOS UI component for picking date and time

📅 Calendar for Apple platforms in Swift

pickadate.js is a responsive jQuery date and time picker designed for web forms. It provides a localized input interface that allows users to select specific calendar dates and precise clock times. The library features a customizable calendar UI with configurable colors, sizes, and breakpoints. It includes a localization system to adapt interface text and date formats into multiple languages and regional settings. The component includes interactive date and time inputs and a styling system for modifying visual design to match specific brand identities. Its layout automatically adjusts for di

bootstrap-datepicker is a JavaScript calendar widget and UI extension designed to integrate with the Bootstrap CSS framework. It provides a graphical calendar interface for selecting dates within web applications, serving as a specialized component for Bootstrap web forms. The project functions as a client-side date selection tool that replaces manual text entry with an interactive calendar popup. It focuses on improving the frontend user interface for date-related inputs.

Taiga UI is an Angular UI component library and accessible design system used for building enterprise web interfaces. It provides a comprehensive collection of reusable interface elements and layout tools, functioning as a mobile-first UI kit with responsive components that adapt to different device capabilities. The library distinguishes itself through an integrated data visualization library featuring various chart types and a dedicated form management framework with built-in validation and formatting for specialized data. It also features AI-driven development workflows by integrating comp

This project is a UI library for building customizable calendar views across Android and Kotlin Multiplatform projects. It provides a recycler-based architecture for creating month, week, and year calendars, alongside a set of composable functions for rendering interactive date pickers and month views in Jetpack Compose. The library includes a contribution heat map component for displaying data density over time using color-coded day cells. It also provides a toolkit for implementing date range selection interfaces that support single date, multiple date, or date range selection with boundary

MUI X is a collection of advanced React UI components for building data-rich applications, including a data grid, charting library, date and time pickers, scheduler, and tree view. The library is built with accessibility as a core principle, ensuring all components meet WCAG and WAI-ARIA standards for keyboard navigation and screen reader announcements. The components are designed for extensibility and performance. The data grid offers comprehensive data management with sorting, filtering, pagination, column pinning, row grouping, inline editing, and Excel export. The charting library support

This project is a collection of native directives designed to implement the Bootstrap component framework within Angular applications. It provides a suite of modular interface elements that allow developers to build interactive web components without requiring external JavaScript dependencies. The library distinguishes itself by using a dependency-free logic layer that relies entirely on native framework primitives. It features a specialized service-based positioning engine to manage the placement of floating overlays and an event-driven system to coordinate the lifecycle of complex UI elemen

Planify is a task management application and productivity suite designed for organizing to-do lists and schedules. It functions as a desktop tool for personal task management, featuring a visual calendar for planning deadlines and tracking daily productivity. The project integrates cloud synchronization to maintain data consistency across multiple devices. It also includes a natural language interface that acts as a documentation assistant, utilizing an API to retrieve answers and excerpts from technical content. The application covers a broad range of organizational capabilities, including

bootstrap-datepicker is a JavaScript calendar widget and UI extension designed for the Bootstrap CSS framework. It provides a client-side input component for web forms that allows users to select single dates or date ranges through a navigable monthly calendar view. The component includes localized calendar interfaces that adapt visual layouts and date formats to match different languages and regional standards. It also features custom date validation to restrict user input by disabling specific days or setting minimum and maximum date boundaries.

Coss is an accessible UI component library and design system framework used to build web interfaces. It provides a comprehensive kit of interactive elements and layout building blocks that follow screen reader and keyboard navigation standards. The project functions as a UI overlay management library, offering specialized tools for implementing anchored popovers, tooltips, and slide-out panels with smooth transitions. It includes a set of accessible form primitives and selection controls to ensure compatibility across different assistive technologies. Its broader capabilities cover the const