Open-source alternatives to React Big Calendar

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

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

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

timesheet.js is a JavaScript library for rendering time-series data and event lists as responsive HTML and CSS timelines. It serves as a date-based event renderer that converts lists of dated activities into visual chronologies, supporting the creation of web-based timesheets and activity logs. The library provides components for generating visual timelines, time-tracking tables, and project scheduling displays. It transforms raw event data—including start dates, end dates, descriptions, and categories—into structured HTML interfaces that adapt to different screen sizes.

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-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.

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

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

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

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

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

Luxon is a JavaScript library for parsing, validating, manipulating, and formatting dates and times. It provides a suite of immutable objects for managing points in time, durations, and intervals, ensuring that all transformations return new instances to maintain predictable state. The library distinguishes itself by leveraging the native Internationalization API and environment-based time zone databases. This architecture allows for localized date formatting and global time zone conversions without requiring external data files or additional dependencies. It also supports non-Gregorian calen

react-day-picker is a customizable calendar interface for React web applications. It provides a user interface for selecting single days, multiple dates, or date ranges while complying with WCAG 2.1 AA standards for assistive technology compatibility. The component supports internationalized date input, adapting formats and languages to match regional requirements. It further extends this global support by providing a multi-calendar date selector that functions with non-Gregorian systems, including Persian, Hijri, Buddhist, Ethiopic, and Hebrew calendars. The library covers interactive date

SwiftDate is a date manipulation library for the Swift programming language. It provides a toolkit for parsing, validating, and formatting dates, times, and timezones. The library includes a relative time generator for producing date offsets based on reference points such as tomorrow or next week, and a localized date formatter for transforming date objects into human-readable strings across multiple languages and locales. It also features an ISO8601 date parser to convert standardized date strings from SQL, HTTP, and ISO8601 formats into structured objects, alongside tools for managing timez

Moment is a JavaScript date manipulation library used for parsing, validating, manipulating, and formatting dates and times. It provides a system for converting date strings into structured objects using the ISO 8601 standard or custom tokens. The library includes a timezone management tool for handling UTC offsets and geographic timezones, ensuring accurate date calculations across different regions. It features an internationalized date formatter and a relative time calculator to render timestamps as human-friendly durations adapted to various cultural locales and languages. The project co

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

Day.js is a lightweight utility for parsing, validating, and manipulating date objects. It provides a fluent, chainable interface that allows for complex time calculations and transformations to be performed through a sequence of readable method calls. By utilizing an immutable wrapper pattern, the library ensures data integrity by creating new instances for every operation rather than modifying existing objects. The project is distinguished by a minimalist core abstraction that maintains a small footprint by offloading non-essential features to an optional, modular plugin system. This archit

Basecoat is a zero-runtime UI library and themable interface framework consisting of a set of accessible web components. It provides a collection of pre-styled interface elements and utility classes designed to function as static assets without requiring a dedicated JavaScript framework runtime. The project features a dedicated UI component scaffolder, providing a command line interface to automate the generation of project folder structures and the installation of component templates. Visual styles are managed through a system of CSS variables and utility classes, allowing for global theme a

new.css is a classless CSS framework that styles semantic HTML elements automatically. It provides a modern visual design for websites by applying rules directly to standard HTML tags, removing the requirement for manual class name assignments. The project includes a CSS theme engine and predefined aesthetic skins, such as a high-contrast dark mode and a terminal-style interface featuring monospace typefaces and command-line color schemes. These visual identities are managed through CSS variables, allowing for palette customization and theme switching. The framework covers a range of visual

Bootflat is a front-end component library and CSS framework extension that implements a flat-design aesthetic for web application styling. It provides a set of reusable interface elements and a mobile-first grid system to facilitate responsive web design. The project integrates design and development through a PSD-driven workflow, providing professional Photoshop component sets and curated color palettes for interface prototyping. Visual customization is handled via variable-based theme overrides for colors and fonts. The library covers a broad range of UI components, including form elements

LapisCV is a PDF document generator and resume builder designed to convert structured Markdown text into professional curriculum vitae. It functions as a rendering pipeline that transforms simple markup and variables into print-ready documents using a headless browser engine or LaTeX templates. The project provides a collection of professional themes and visual styles to customize the typography and branding of academic and professional resumes. It utilizes variable-based style injection to allow for the adjustment of fonts, colors, and margins based on content volume and user preferences. T

This project is a React-based administrative template and UI kit designed for building dashboards. It provides a comprehensive collection of pre-styled layouts, an accessible component library, and a Sass-based UI framework for creating administrative interfaces. The template is specifically structured as an AI-optimized project, utilizing coding patterns and organization designed to help AI assistants generate consistent, production-ready React code. It features a flexible styling system using Sass variables and CSS custom properties to support customizable light and dark themes. The kit co

BOOTSTRA.386 is a retro CSS framework and web UI kit designed to implement nostalgic user interfaces that mimic the aesthetic of vintage computer systems and old-school operating systems. It provides a collection of pre-styled components and styling engines to maintain a consistent legacy appearance across different screen sizes. The toolkit includes a customizable theme engine and a web-based interface for modifying visual properties and colors. It also features a responsive grid layout system that organizes web content into columns and rows that adapt to various device dimensions. The proj

nprogress is a lightweight JavaScript UI component and web progress bar library. It provides a minimalist DOM progress indicator used to track the state of asynchronous operations within a browser document. The library allows for the visualization of loading states through a thin progress bar and spinner. It supports progress state management, enabling the bar to be started, stopped, or marked as complete, with support for incremental progress tracking and percentage-based updates. Users can modify the visual style by overriding default CSS or replacing the markup template. The component als

react-select is a customizable select input for React applications that supports single and multiple value selection with integrated search. It functions as a form input library providing a selection interface capable of fetching and displaying options from remote APIs dynamically as a user types. The library is distinguished by a component-injection architecture that allows users to replace internal UI fragments with custom React components. It further enables deep visual customization through prop-based style merging, allowing user-defined CSS objects to override internal defaults for brand

This project is a cross-platform mobile tab navigator for React Native. It provides a swipable tab interface and an animated view switcher that allows users to move between different content areas using horizontal swipe gestures. The system features a customizable tab bar component that can be styled or replaced with custom components to control the visual layout. It supports independent scroll state management, ensuring each individual page maintains its own vertical scroll position when switching views. The navigation framework handles tab transition control and adjacent page pre-rendering

tapkulibrary is a collection of reusable user interface elements and layout utilities for building native iOS applications. It provides a modular set of building blocks, including a custom graphics framework, networking toolkits, and specialized interface components. The library includes a dedicated media gallery component for creating 3D perspective coverflow galleries and swipeable lists, as well as a grid-based calendar interface for monthly event layouts and date selection. The toolkit covers asynchronous network communication, allowing for data request scheduling on background threads.