date-fns
Moment.js
Luxon
js-Joda
Next.js
Nuxt.js
CakePHP
2kB JavaScript date utility library

YieldStack
CBRE Group
Jones Lang LaSalle
Online platform for commercial real estate loans

Which is more popular?
Based on our record, Day.js seems to be more popular. It has been mentioned 43 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | day.js.org | stacksource.com |
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Recommendations tracked on public social media and blogs since March 2021.

Date strings. ISO 8601 timestamps like "2026-04-27T10:00:00Z" are string to the converter. If you're parsing them with date-fns or dayjs, you'll want to change those to Date in your final types. - Source: dev.to / 6 months ago
Dayjs - Fast 2kB alternative to Moment.js with the same modern API. - Source: dev.to / 9 months ago
I think the JS Date class should be avoided for anything related to DateTime. Instead, use one of the established libraries: Moment.js or Day.js. And in the near future, use the successor of Date, the new Temporal API. - Source: dev.to / about 1 year ago
Tracking StackSource since May 2023.
When comparing Day.js and StackSource, you can also consider the following products.

date-fns provides the most comprehensive yet simple and consistent toolset for manipulating JavaScript dates in a browser & Node.js.
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AI-native commercial mortgage brokerage. One submission, lender matching, and human support through closing. No upfront fees.
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Parse, validate, manipulate, and display dates in JavaScript
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CBRE Group, Inc. is a holding company that conducts all of its operations through its indirect subsidiaries
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Application and Data, Libraries, and Javascript Utilities & Libraries
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Jones Lang LaSalle, a financial and professional services firm, specializes in commercial real estate services and investment management.
Compare Jones Lang LaSalle to Day.js or StackSource: