Open-source alternatives to Flatpickr

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

JTAppleCalendar is a customizable calendar component and date picker library for iOS applications built with Swift. It provides a programmable user interface control designed to display date-based grids and manage date selection. The library supports both single-date and range-based selection modes, allowing for the highlighting of continuous date spans. It features a flexible grid system that enables custom cell rendering and protocol-based customization to match specific application aesthetics. The component includes capabilities for date navigation, range restriction to define viewable bo

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

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-

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

Pendulum is a Python date and time library that provides a simplified interface for date arithmetic, ISO parsing, localization, and timezone management. It serves as a replacement for the standard library datetime module, extending existing classes to maintain compatibility while offering a more intuitive management interface. The library distinguishes itself through a natural language date formatter that translates time differences into localized strings and a dedicated ISO 8601 date parser. It also includes tools for time-dependent logic testing, allowing the system clock to be mocked or fi

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

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.

MaterialDateTimePicker is a library of Material Design-compliant UI components for Android, providing standardized widgets for selecting dates, times, and combined temporal values. It implements a set of customizable dialogs that follow the Material Design system to ensure consistent user interface interactions. The library features a combined date and time picker that coordinates the sequential display of calendar and clock dialogs. It provides specific constraints for both date and time selection, allowing the restriction of selectable ranges, specific days, and required time intervals. Vi

This repository contains the HTML specification, which defines the core standards for web page structuring, content organization, and document rendering. It establishes the fundamental algorithms for state-machine-based tokenization, tree construction for the document object model, and origin-based security isolation. The specification provides a framework for defining custom elements with independent lifecycles and registries. It also details the requirements for cross-document communication, session history management, and the synchronization of interface properties with content attributes.

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

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

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

Carbon is a Go library for semantic date and time calculations, formatting, and parsing. It provides a semantic interface to simplify temporal data handling and improve the readability of date and time manipulations. The library is distinguished by its support for multi-calendar date conversion, allowing transformations between Gregorian, Chinese Lunar, Persian, and Hebrew calendar systems. It also includes a localized temporal framework that uses ISO 639-1 codes to format dates and relative time differences across multiple language locales. Additional capabilities cover global time zone man

Pendulum is a Python datetime library used for creating, manipulating, and formatting date and time objects with native timezone awareness. It extends the native Python datetime class to maintain compatibility while providing a specialized engine for date arithmetic and timezone management. The library features a dedicated ISO 8601 and RFC 3339 parser that converts standardized strings into date objects without requiring manual format strings. It also includes a relative time generator for producing natural language descriptions of time differences and a timezone management tool that automati

Tempo is a JavaScript date manipulation library that provides a suite of tools for parsing, formatting, and calculating dates and times. It serves as a date arithmetic engine, a locale-aware formatter, and a timezone offset manager for native JavaScript date objects. The library includes a dedicated ISO 8601 date parser for validating and converting standardized strings into date objects. It handles geographic normalization through IANA timezone offset management and utilizes the native Internationalization API for region-specific date formatting. The project covers a broad range of date and

This project is a comprehensive date and time library designed for parsing, formatting, and calculating dates and times with high precision. It provides a multi-calendar system implementation that supports conversions between proleptic Gregorian, Julian, ISO week, and Tabular Islamic calendars. The library is distinguished by its high-precision time clocks and its implementation of the IANA time zone database. It tracks physical time using UTC, TAI, and GPS clocks to account for leap seconds and provides a system for managing geographic time zones and offsets based on IANA data. The capabili

Arrow is a Python date and time library that provides a simplified interface for creating and manipulating timestamps by wrapping the Python standard library. It serves as a tool for managing date objects, handling timezone offsets, and performing relative date calculations. The library is distinguished by its ability to humanize timestamps into natural language relative descriptions across multiple locales and parse human-readable time phrases back into precise date objects. It also features a specialized parser for converting ISO 8601 strings and custom formatted text into date objects. Br

v-calendar is a customizable calendar and datepicker component for Vue applications. It provides an interactive calendar UI and a flexible datepicker plugin designed for date and time selection, including support for single dates, date ranges, and specific timestamps. The project is distinguished by its extensive UI customization options, allowing the replacement of default headers and navigation buttons via custom component slots. It features date decoration capabilities such as date markers, highlights, and popovers to visually distinguish specific days or recurring patterns. The component

DataFrame is a C++ tabular data library and manipulation engine designed for managing heterogeneous data in contiguous memory. It functions as a statistical analysis framework and time series analysis toolkit, providing the means to store, index, and transform multidimensional datasets. The project distinguishes itself through a high-performance execution model that utilizes column-major storage, SIMD-aligned memory allocation, and a thread-pool for parallel computations. It employs a visitor-based algorithm dispatch system and policy-driven transformations to decouple data processing logic f

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.

This project is a reusable React datepicker component providing an accessible, localized interface for selecting dates and times within web applications. It functions as an input field that triggers a calendar popup for precise temporal data entry. The component is designed for flexibility, allowing for a customizable calendar layout and the integration of custom external elements to trigger the picker. It supports marking holidays with custom labels and styles and implements date selection restrictions through boundaries, exclusion lists, and filter functions. The system includes comprehens

FSCalendar is a customizable calendar UI library and date picker component for iOS applications. It provides a programmable interface for rendering date grids and event markers, supporting both Swift and Objective-C development. The library enables the creation of custom date picking interfaces with specific range restrictions and selection rules. It supports the display of date-based metadata and event visualization within a mobile scheduling context. The framework covers visual styling and cell design, allowing for custom view components, subtitles, and event markers. It includes a flexibl

react-dates is a set of React components for date selection, providing interfaces for picking single dates or date ranges through controlled input components and calendars. The project features built-in support for internationalization, allowing date formats and interface strings to be translated via locale settings. It also supports visual customization through theme registration and CSS overrides to match specific application styles. The component suite covers a variety of selection workflows, including calendar range selection and date range input fields.

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

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