7 Best Alternatives to dayjs in 2026

Why look beyond dayjs

Day.js is recognized for its small bundle size and API compatibility with Moment.js, making it a common choice for projects prioritizing minimal overhead. However, specific project requirements may lead developers to explore other libraries. For instance, while Day.js provides core date manipulation, some alternatives offer more extensive internationalization support, immutable date objects by default, or a fully modular design that allows developers to import only the functions they need.

Projects requiring advanced time zone handling, precise duration calculations, or a comprehensive set of localization features might find that other libraries provide a more direct solution without the need for additional plugins. Furthermore, while Day.js aims for a lightweight core, alternatives like date-fns emphasize a functional, tree-shakeable approach, which can be beneficial for optimizing bundle sizes in different contexts. Understanding these distinctions helps in selecting a library that aligns with a project's long-term maintenance and performance goals.

Top alternatives ranked

1. 1. Moment.js — A comprehensive, battle-tested date library

   Moment.js is a long-standing and widely adopted JavaScript library for parsing, validating, manipulating, and formatting dates. It gained significant popularity due to its comprehensive feature set and intuitive API. While its development has largely concluded, with the project advising new projects to consider alternatives, it remains a robust solution for existing applications or those prioritizing a mature, feature-rich library with extensive community support. Moment.js handles a wide range of date operations, including complex parsing, duration calculations, and internationalization, often through a mutable object approach.

   Its API is very similar to Day.js, making it a straightforward transition for developers moving between the two. Moment.js has a larger bundle size compared to Day.js and does not inherently support tree-shaking, which can be a consideration for performance-critical applications. However, its stability and broad feature set continue to make it a viable option for many projects, particularly those not strictly bound by bundle size constraints.

   Best for:

   • Existing projects that already use Moment.js or need its full feature set.
   • Applications where bundle size is not the primary constraint.
   • Developers familiar with its API seeking a mature solution.

   Learn more on the Moment.js profile page or its official website.

2. 2. date-fns — Modular and immutable date utilities

   date-fns is a modern JavaScript date utility library that provides a comprehensive set of functions for date manipulation. Unlike Moment.js and Day.js, date-fns is designed to be fully modular and immutable. Each function is a pure function, meaning it does not modify the original date object but instead returns a new one. This functional programming approach enhances predictability and simplifies debugging. Its modular design allows for effective tree-shaking, ensuring that only the necessary code is included in the final bundle, which can lead to smaller application sizes.

   date-fns offers extensive internationalization support, with functions available for nearly every locale. It emphasizes a native JavaScript Date object approach, reducing the learning curve for developers already familiar with standard JavaScript date methods. The library's focus on individual functions rather than a monolithic object makes it highly flexible for various project needs, from simple formatting to complex date calculations.

   Best for:

   • New projects prioritizing small bundle sizes and tree-shaking.
   • Applications requiring a modular, functional approach to date manipulation.
   • Developers who prefer immutable date objects and native Date compatibility.

   Learn more on the date-fns profile page or its official website.

3. 3. Luxon — Immutable and powerful date/time library

   Luxon is a modern JavaScript library for working with dates and times, developed by the creators of Moment.js. It distinguishes itself by providing immutable date objects and a focus on internationalization and time zone handling. Luxon objects are always immutable, meaning operations like adding days or setting a time zone return a new Luxon object rather than modifying the original. This design choice contributes to more predictable code and fewer side effects.

   Luxon is built on the native JavaScript Intl API for robust internationalization and time zone support, offering accurate and reliable handling of complex date scenarios. It provides a rich API for parsing, formatting, and manipulating dates, including precise duration and interval calculations. While its bundle size is generally larger than Day.js due to its comprehensive features, Luxon is an excellent choice for applications that require advanced date and time functionality, especially in global contexts where accurate time zone and locale handling are critical.

   Best for:

   • New projects that require robust internationalization and time zone support.
   • Applications where immutable date objects are preferred for predictability.
   • Developers seeking a modern, comprehensive date/time solution.

   Learn more on the Luxon profile page or its official website.

4. 4. Lodash — A utility belt with date formatting capabilities

   Lodash is a JavaScript utility library that provides a wide array of helper functions for common programming tasks, including array, object, string, and number manipulation. While not a dedicated date and time library like Day.js or Moment.js, Lodash includes a _.template function that can be used for basic date formatting when combined with native JavaScript Date objects. It is often used in conjunction with other libraries or native methods for more complex date operations.

   Lodash's strength lies in its broad utility set, offering functions that can complement date handling by simplifying data processing around dates. For instance, developers might use Lodash to process arrays of date objects, sort them, or extract specific properties after they have been parsed or formatted by another method. Its modular design allows developers to import only the specific functions they need, contributing to optimized bundle sizes. For projects already using Lodash for other utilities, its basic formatting capabilities might suffice for simple date display requirements, avoiding the need for an additional dedicated date library for minimal tasks.

   Best for:

   • Projects already using Lodash for other utility functions.
   • Basic date formatting tasks where a full date library is overkill.
   • Complementing native JavaScript Date objects with utility functions.

   Learn more on the Lodash profile page or its official documentation.

5. 5. Vanilla JavaScript (Native Date Object) — Built-in date functionality

   Vanilla JavaScript, specifically the native Date object, provides fundamental capabilities for handling dates and times without requiring any external libraries. It can parse various date formats, perform basic arithmetic (like adding or subtracting days), and format dates into strings. Modern JavaScript engines and the Intl API have significantly enhanced the native Date object's capabilities, particularly for internationalization and locale-specific formatting.

   For simple use cases, such as displaying the current date, calculating the difference between two dates, or basic formatting, relying solely on the native Date object can eliminate the need for an additional dependency, reducing bundle size and project complexity. While it may require more verbose code for complex manipulations or specific formatting requirements compared to libraries like Day.js, the native Date object offers the ultimate lightweight solution. Developers can also leverage modern browser APIs like Intl.DateTimeFormat for robust, localized date and time formatting.

   Best for:

   • Small projects or micro-frontends with minimal date handling needs.
   • Applications where avoiding external dependencies is a high priority.
   • Developers who prefer to utilize built-in browser features for date and time.

   Learn more about the native JavaScript Date object on MDN Web Docs.

Side-by-side

How to pick

Selecting the right date and time library depends on several factors specific to your project's needs. Consider the following decision points to guide your choice:

• If you prioritize minimal bundle size and an API similar to Day.js for existing projects:
  • Moment.js might be suitable if you need a comprehensive feature set and are migrating from Day.js or an older project that used Moment.js. Be aware of its larger bundle size and the project's maintenance status.
• If you are starting a new project and value small bundle sizes through tree-shaking and an immutable, functional approach:
  • date-fns is an excellent choice. Its modular design allows you to import only the functions you need, leading to highly optimized bundles. Its immutable nature also promotes more predictable code.
• If your project requires advanced internationalization, precise time zone handling, and immutable date objects by default:
  • Luxon is a strong contender. Built by the creators of Moment.js, it offers robust features for complex date and time scenarios, leveraging the native Intl API for accuracy.
• If you already use a general-purpose utility library and only need basic date formatting without adding a dedicated date library:
  • Lodash can be sufficient for simple formatting tasks, especially when combined with native JavaScript Date objects. It helps avoid additional dependencies if its existing utilities meet your needs.
• If your project has extremely minimal date handling requirements and you want to avoid all external dependencies:
  • Vanilla JavaScript (Native Date Object) should be your primary consideration. Modern JavaScript features, including the Intl API, provide robust capabilities for many common date and time operations without any extra code.
• Consider the learning curve: If your team is already familiar with Moment.js, transitioning to Day.js or even Moment.js directly might be easier. If your team prefers a functional programming style, date-fns could be a better fit.
• Evaluate future maintenance: Libraries with active development and strong community support tend to be easier to maintain in the long run. Check the GitHub activity and documentation quality for each alternative.