Side-by-side NPM package comparison
Version 1.11.19
2KB immutable date time library alternative to Moment.js with the same modern API
Version 2.30.1
Parse, validate, manipulate, and display dates
Choosing between Dayjs and Moment? Here's a data-driven comparison based on real npm data — downloads, bundle size, health scores, and more — to help you decide which package fits your project best.
Dayjs leads with 38.5M weekly downloads — roughly 1.3x more. Moment has 30.0M weekly downloads. Higher download counts generally indicate broader community adoption and a larger ecosystem of tutorials, plugins, and support.
Dayjs has the smallest gzipped bundle at 3.0 KB. Moment comes in at 1.2 MB. A smaller bundle size means faster page loads, which improves user experience and Core Web Vitals scores.
Dayjs has an overall health score of 73/100 (good), with strong security, popularity scores. Moment has an overall health score of 73/100 (good), with strong security, popularity scores. Health scores are calculated from maintenance activity, code quality, security posture, popularity, and stability metrics.
Choose Dayjs if you value massive community and ecosystem, minimal bundle footprint, strong security track record. Choose Moment if you value massive community and ecosystem, strong security track record.
Both Dayjs and Moment are solid choices for JavaScript development. Dayjs has the edge in overall health score (73/100), while each package brings unique strengths to the table. Evaluate them based on your project's priorities — whether that's community size, bundle efficiency, or maintenance activity — and choose the one that aligns best with your requirements.