Moment.js: The End of an Era

For nearly a decade, **Moment.js** was the undisputed king of JavaScript date manipulation. If you were building a web app between 2011 and 2020, you almost certainly had `moment` in your `package.json`.

Why We Loved It

Before Moment, the native JavaScript `Date` object was notoriously difficult to use. It lacked basic formatting, had confusing month indexing (0-11), and had no built-in support for timezones. Moment provided a clean, chainable API that made tasks like `moment().add(7, 'days').format('LLLL')` trivial.

The Mutable Problem

The biggest architectural flaw in Moment was its **mutability**. If you called `.add()` or `.subtract()` on a moment object, it changed the original object rather than returning a new one. This led to countless bugs where developers accidentally modified a global "current date" variable.

The Maintenance Mode

In 2020, the Moment team officially announced that the project was entering "maintenance mode." The library had become too large (bundled with all timezone data) and its mutable design was incompatible with modern functional programming patterns and "tree-shaking" optimizations.

Conclusion

While Moment.js is no longer recommended for new projects, its influence is everywhere. It paved the way for the libraries we use today. On the Epoch Clock, we acknowledge Moment as the pioneer that taught a generation of web developers how to handle time.