Technology report · JavaScript library
Day.js usage report
Day.js, a JavaScript library, was detected on 55 of the 66086 websites scanned, a share of 0.1%. The data is dated 2026-10-28. This page shows which industries use it, which technologies commonly appear alongside it, and a few example sites. No version data was captured for any of these sites.
- 55websites using it
- 0.1%of 66,086 scanned websites with a detected technology
- 2026-10-28data date
Industry is known for only 12 of the 55 sites, so the breakdown rests on a small sample. Government and public sector leads with 25.0% (3 sites). Entertainment and streaming and News and media each hold 16.7% (2 sites apiece). Gaming and HR and recruiting each account for 8.3% (1 site apiece). Treat these shares as rough indications, since a single site moves them noticeably.
The sites using Day.js often run a familiar front-end stack. Google Tag Manager and jQuery each appear on 65.5% of them (36 sites). Among content delivery sources, jsDelivr shows up on 34.5% (19 sites), Cloudflare on 32.7% (18 sites) and cdnjs on 29.1% (16 sites). PHP is found on 30.9% (17 sites), Google Fonts on 23.6% (13 sites) and Bootstrap on 21.8% (12 sites).
Example sites where Day.js was detected include nachtkritik.de, changsha.cn, ringling.com, coffeestain.com and tamashii.jp. The versioned site count is 0, so this page cannot say which releases are in use. It is best suited to gauging how widespread Day.js is and what it is typically paired with, not to judging version adoption.
Industries using Day.js
| Industry | Websites | Share of 12 classified |
|---|---|---|
| Government and public sector | 3 | 25% |
| Entertainment and streaming | 2 | 16.7% |
| News and media | 2 | 16.7% |
| Gaming | 1 | 8.3% |
| HR and recruiting | 1 | 8.3% |
Technologies used together with Day.js
| Technology | Websites | Share of Day.js sites |
|---|---|---|
| Google Tag Manager | 36 | 65.5% |
| jQuery | 36 | 65.5% |
| jsDelivr | 19 | 34.5% |
| Cloudflare | 18 | 32.7% |
| PHP | 17 | 30.9% |
| cdnjs | 16 | 29.1% |
| Google Fonts | 13 | 23.6% |
| Bootstrap | 12 | 21.8% |
Example company websites
nachtkritik.de, changsha.cn, ringling.com, coffeestain.com, tamashii.jp
FAQ
- How many websites use Day.js?
- Day.js was detected on 55 of the 66086 websites scanned, which is a share of 0.1%. The data is from the scan dated 2026-10-28.
- Which industries use Day.js most?
- Among the 12 sites with a known industry, Government and public sector leads at 25.0% (3 sites). Entertainment and streaming and News and media follow at 16.7% each (2 sites each).
- What technologies are commonly used alongside Day.js?
- Google Tag Manager and jQuery are the most frequent companions, each on 65.5% of Day.js sites (36 sites). jsDelivr, Cloudflare, PHP, cdnjs, Google Fonts and Bootstrap also appear.
- Which versions of Day.js are most common?
- This cannot be answered from the data. Version information was available for 0 sites, so no version breakdown is reported for Day.js.
- Which websites use Day.js?
- Examples from the scan include nachtkritik.de, changsha.cn, ringling.com, coffeestain.com and tamashii.jp. These are a sample of the 55 sites where Day.js was detected, not a complete list.
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