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

Ghost
Medium
Buttondown
WordPress
beehiiv
MailChimp
Notocat
With Substack, anyone can start a publication that combines a personal website, blog, and email newsletter or podcast. It's quick and simple.
Which is more popular?
Based on our record, Substack should be more popular than Day.js. It has been mentioned 109 times since March 2021.
Website, pricing, platforms and company facts side by side.
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Day.js
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| Website | day.js.org | substack.com |
| Pricing | — | |
| Company | — | Startup from the United States |
| Listed in |
What each product offers, as listed by its team.

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An editorial look at what each product does well and who it suits.

No analysis of Day.js yet.
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Monetizing Podcasts and Newsletters - Chris Best of Substack and Jonathan Gill of Backtracks
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How often each product is chosen within a category, 0–100% relative to the other.

Share your experience with using Day.js and Substack. For example, how are they different and which one is better?
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Substack offers writers of all experience levels the ability to write an email newsletter that’s profitable through subscriptions. Substack provides purpose-built web and newsletter publishing tools to enable writers...
What sеts Substack apart is its sеamlеss intеgration of contеnt crеation and subscription-basеd monеtization. Substack’s usеr-friеndly intеrfacе, distribution tools, and support for various contеnt formats make it a...
Substack and Medium differ primarily in their monetization methods. Medium pays creators based on reader engagement, while Substack enables writers to monetize directly through paid subscriptions to their newsletters....
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 / 8 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 / 12 months ago
Https://substack.com/@rubenafo/note/c-332218129?r=26y5kn&utm_source=notes-share-action&utm_medium=web. - Source: Hacker News / 8 days ago
Https://substack.com/@gurwinder/posts. - Source: Hacker News / 11 days ago
Substack: https://substack.com/@friedkielbasa. - Source: Hacker News / 14 days ago
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Parse, validate, manipulate, and display dates in JavaScript
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Welcome to Medium, a place to read, write, and interact with the stories that matter most to you.
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Application and Data, Libraries, and Javascript Utilities & Libraries
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Buttondown is the best way to start and run your newsletter
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