A comprehensive, modular JavaScript date utility library for manipulating dates in browsers and Node.js.
date-fns is a modern JavaScript utility library for manipulating dates and times in both browser and Node.js environments. It provides over 200 functions for parsing, formatting, comparing, and calculating dates, solving the common pain points of working with JavaScript's native Date object. The library is designed to be modular, immutable, and type-safe.
JavaScript and TypeScript developers who need reliable date manipulation in web applications, Node.js backends, or any project requiring consistent date handling.
Developers choose date-fns for its modular architecture, which allows tree-shaking to minimize bundle size, its pure functional approach ensuring predictability, and its first-class TypeScript support with excellent type definitions.
⏳ Modern JavaScript date utility library ⌛️
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Functions can be imported individually, allowing bundlers like webpack to eliminate unused code, which minimizes bundle size as highlighted in the README.
All functions are pure and return new date instances, ensuring predictable behavior and avoiding side effects, making code more reliable.
Written entirely in TypeScript with handcrafted type definitions, providing excellent type safety and developer experience out of the box.
Includes dozens of locales that can be loaded on-demand, facilitating internationalization without bloating the bundle, as mentioned in the features.
Major version updates like v4.0 introduce breaking changes, such as new time zone APIs, requiring significant refactoring in existing projects, as noted in the blog announcement.
For basic date operations, the pure functional approach can add unnecessary complexity and slight performance overhead compared to direct native Date methods.
With over 200 functions, new users may find the API overwhelming and need time to learn the optimal functions, which can slow down initial adoption.
date-fns is an open-source alternative to the following products: