Websites Powered by Day.js
142,515 websites tracked using Day.js (JavaScript libraries) · github.com
Day.js is a JavaScript library used to add functionality to web pages. Its official site is github.com. PoweredBy tracks the websites that use Day.js across the public web; the tracked counts, adoption trend, and site list on this page are updated from our ongoing crawl of the javascript libraries ecosystem.
Usage trend
20K
40K
60K
Mar 2019
Jan 2021
Mar 2023
Dec 2024
Oct 2026
Domains observed using Day.js in each month's HTTP Archive crawl,
Mar 2019 to Oct 2026 · peak 50,801 in Jun 2026. The tracked total above also
counts sites not re-crawled recently.
Core Web Vitals
LCP 1.7 s
INP 75 ms
CLS 0
TTFB 700 ms
Median site among 55,210 Day.js sites with Chrome UX data, p75 values, Sep 2026.
Top countries
United States
14,792
Japan
9,068
Taiwan
8,471
India
5,710
United Kingdom
4,861
Germany
4,547
France
3,955
Brazil
3,856
Sites using Day.js by audience country, Chrome UX Report.
Usage by industry
| Industry | Share | Websites |
|---|---|---|
| Real estate | 3.43% | 2,788 |
| Industrial and manufacturing | 1.00% | 51 |
| Retail | 0.80% | 2,944 |
| Travel and hospitality | 0.48% | 413 |
| Education | 0.47% | 297 |
| Pets and animals | 0.41% | 13 |
| Government | 0.30% | 28 |
| Arts and entertainment | 0.26% | 136 |
| Restaurants and food | 0.20% | 319 |
| Beauty and wellness | 0.20% | 63 |
| News and media | 0.18% | 88 |
| Finance and insurance | 0.16% | 34 |
Share of each industry's websites with a detected stack that use Day.js; industries come from what sites declare in their own structured data.
Top sites by authority
9+
8% · 31 of 372 sites
8+
4% · 343 of 7,677 sites
7+
2% · 996 of 45,712 sites
6+
1% · 1,644 of 110,136 sites
5+
<1% · 2,399 of 246,751 sites
The share of the web's most authoritative domains, by Open Page Rank tier, seen running Day.js in recent crawls. Only 372 domains worldwide score 9 or higher.
Websites using Day.js
| # | Domain | Open Page RankOPR | Est. monthly visits (US)Visits (US) | Keywords | First seen |
|---|---|---|---|---|---|
| 201 | jpn.com | 8.36/10 | - | - | Sep 2020 |
| 202 | thalesgroup.com | 8.36/10 | 23,400 | 11,711 | Aug 2023 |
| 203 | dyndns.org | 8.36/10 | - | - | Oct 2023 |
| 204 | bcb.gov.br | 8.36/10 | 83,600 | 15,876 | Sep 2022 |
| 205 | unt.edu | 8.36/10 | 188,300 | 23,407 | Jul 2021 |
| 206 | pref.aichi.jp | 8.36/10 | 440 | 254 | Oct 2024 |
| 207 | cisecurity.org | 8.35/10 | 54,300 | 22,048 | Jun 2026 |
| 208 | kew.org | 8.35/10 | 180,000 | 35,250 | Feb 2025 |
| 209 | philips.com | 8.35/10 | 20,400 | 7,843 | Jul 2021 |
| 210 | equifax.com | 8.34/10 | 1,129,800 | 65,451 | Jul 2021 |
| 211 | thalia.de | 8.34/10 | 3,900 | 19,538 | Dec 2025 |
| 212 | sdsu.edu | 8.34/10 | 60,700 | 22,337 | Jul 2026 |
| 213 | switch.ch | 8.33/10 | 99 | 113 | Apr 2025 |
| 214 | fidelity.com | 8.33/10 | 5,283,600 | 316,962 | Sep 2025 |
| 215 | deakin.edu.au | 8.33/10 | 8,100 | 7,868 | Mar 2019 |
| 216 | uw.edu.pl | 8.33/10 | 240 | 261 | Sep 2026 |
| 217 | unipi.it | 8.32/10 | 1,500 | 1,950 | Jan 2023 |
| 218 | rijksmuseum.nl | 8.32/10 | 31,100 | 6,477 | Mar 2025 |
| 219 | cafe24.com | 8.31/10 | 6 | 6 | Sep 2022 |
| 220 | lilly.com | 8.30/10 | 205,500 | 21,013 | Oct 2022 |
| 221 | isc2.org | 8.30/10 | 59,000 | 20,996 | Mar 2026 |
| 222 | okstate.edu | 8.30/10 | - | - | Apr 2025 |
| 223 | carleton.ca | 8.30/10 | 49,300 | 20,005 | Apr 2025 |
| 224 | miteco.gob.es | 8.30/10 | 3,600 | 8,935 | Aug 2026 |
| 225 | rstudio.com | 8.29/10 | 1 | 2 | Oct 2022 |
| 226 | nttdata.com | 8.29/10 | 8,000 | 8,505 | Oct 2026 |
| 227 | ncaa.com | 8.28/10 | 6,466,000 | 479,239 | Sep 2022 |
| 228 | dmm.com | 8.28/10 | 130 | 101 | Jan 2021 |
| 229 | fourseasons.com | 8.28/10 | 1,292,700 | 186,948 | Mar 2024 |
| 230 | jma.or.jp | 8.28/10 | 24 | 46 | Aug 2025 |
| 231 | umanitoba.ca | 8.28/10 | 25,600 | 17,260 | Jun 2025 |
| 232 | tsukuba.ac.jp | 8.28/10 | 1,800 | 517 | Jun 2025 |
| 233 | firebaseapp.com | 8.27/10 | - | - | May 2023 |
| 234 | bindsite.jp | 8.27/10 | - | - | Oct 2020 |
| 235 | thermofisher.com | 8.27/10 | 1,061,900 | 134,533 | Jul 2021 |
| 236 | united.com | 8.27/10 | 7,980,100 | 405,211 | Oct 2022 |
| 237 | stonybrook.edu | 8.27/10 | 348,800 | 65,542 | Feb 2024 |
| 238 | pdx.edu | 8.27/10 | 151,700 | 24,420 | Apr 2025 |
| 239 | ou.edu | 8.27/10 | 392,000 | 52,695 | Aug 2022 |
| 240 | cea.fr | 8.27/10 | 2,000 | 1,809 | Jan 2026 |
| 241 | ig.com.br | 8.27/10 | 17 | 58 | Oct 2020 |
| 242 | phila.gov | 8.27/10 | 637,400 | 172,156 | Sep 2021 |
| 243 | slu.se | 8.27/10 | 2,400 | 1,343 | May 2025 |
| 244 | act.org | 8.26/10 | 529,100 | 76,008 | Oct 2023 |
| 245 | unlv.edu | 8.26/10 | 316,600 | 57,351 | May 2024 |
| 246 | chop.edu | 8.26/10 | 1,318,800 | 212,894 | Mar 2023 |
| 247 | roberthalf.com | 8.25/10 | 414,200 | 79,385 | Jan 2023 |
| 248 | uhc.com | 8.25/10 | 1,963,700 | 235,514 | Jul 2023 |
| 249 | shopee.co.id | 8.25/10 | 27,300 | 103,068 | Jun 2024 |
| 250 | toyota.com | 8.25/10 | 6,010,700 | 283,955 | Dec 2022 |
| 251 | naic.org | 8.25/10 | 300 | 126 | Sep 2025 |
| 252 | furunavi.jp | 8.25/10 | 16 | 46 | Apr 2025 |
| 253 | nagoya-u.ac.jp | 8.25/10 | 11 | 36 | Nov 2020 |
| 254 | disney.co.jp | 8.24/10 | 610 | 239 | Oct 2022 |
| 255 | du.edu | 8.24/10 | 98,500 | 37,216 | May 2025 |
| 256 | wayne.edu | 8.24/10 | 157,300 | 20,945 | Jan 2026 |
| 257 | unr.edu | 8.24/10 | 321,100 | 76,915 | Apr 2025 |
| 258 | sub.jp | 8.24/10 | - | - | May 2022 |
| 259 | uj.edu.pl | 8.24/10 | 360 | 132 | Jul 2026 |
| 260 | yamaha.com | 8.23/10 | 246,300 | 20,008 | Feb 2025 |
| 261 | iccsafe.org | 8.23/10 | 184,700 | 20,625 | Oct 2025 |
| 262 | pwc.co.uk | 8.23/10 | 4,400 | 5,454 | May 2023 |
| 263 | site123.me | 8.23/10 | - | - | Sep 2020 |
| 264 | sheffield.ac.uk | 8.23/10 | 48,800 | 24,975 | Apr 2025 |
| 265 | smu.edu | 8.23/10 | 375,200 | 49,730 | Sep 2026 |
| 266 | swisscom.ch | 8.23/10 | 3,000 | 1,840 | Dec 2024 |
| 267 | michaels.com | 8.22/10 | 2,547,100 | 864,217 | Feb 2025 |
| 268 | sports.gouv.fr | 8.22/10 | 520 | 789 | Apr 2024 |
| 269 | inrs.fr | 8.22/10 | 2,200 | 1,410 | Dec 2023 |
| 270 | upf.edu | 8.22/10 | 4,700 | 3,555 | May 2024 |
| 271 | chiba.lg.jp | 8.22/10 | - | - | Apr 2026 |
| 272 | leidenuniv.nl | 8.22/10 | - | - | Oct 2021 |
| 273 | fhnw.ch | 8.22/10 | 400 | 746 | Feb 2025 |
| 274 | usbank.com | 8.21/10 | 3,082,200 | 274,578 | Aug 2022 |
| 275 | cfainstitute.org | 8.21/10 | 125,400 | 34,362 | Nov 2024 |
| 276 | nmsu.edu | 8.21/10 | 33,000 | 10,185 | Aug 2023 |
| 277 | uba.ar | 8.21/10 | 670 | 586 | Apr 2024 |
| 278 | freddiemac.com | 8.19/10 | 827,200 | 21,069 | Jul 2021 |
| 279 | uni-konstanz.de | 8.18/10 | 2,100 | 1,030 | Mar 2025 |
| 280 | pref.ibaraki.jp | 8.17/10 | 180 | 70 | Mar 2026 |
| 281 | blizzard.com | 8.16/10 | 59,000 | 6,274 | Jul 2021 |
| 282 | gsk.com | 8.16/10 | 91,700 | 21,004 | Jul 2026 |
| 283 | au.com | 8.15/10 | 3,100 | 1,693 | Jan 2024 |
| 284 | technion.ac.il | 8.15/10 | 1,300 | 301 | Jan 2022 |
| 285 | pwc.de | 8.15/10 | 6,100 | 760 | Mar 2024 |
| 286 | aeroport.fr | 8.15/10 | 98 | 153 | Jan 2026 |
| 287 | ntnu.no | 8.14/10 | 4,600 | 1,879 | Feb 2024 |
| 288 | opentext.com | 8.13/10 | 75,000 | 28,095 | Nov 2024 |
| 289 | jpn.org | 8.13/10 | - | - | Dec 2020 |
| 290 | pr.gov | 8.11/10 | 6,100 | 2,445 | Apr 2025 |
| 291 | luc.edu | 8.11/10 | 178,000 | 40,020 | Sep 2025 |
| 292 | newschool.edu | 8.11/10 | 61,500 | 35,182 | Feb 2025 |
| 293 | wallonie.be | 8.10/10 | 320 | 742 | Sep 2026 |
| 294 | psl.eu | 8.10/10 | 5,400 | 3,246 | May 2025 |
| 295 | fau.edu | 8.10/10 | 325,800 | 59,056 | Aug 2022 |
| 296 | kia.com | 8.09/10 | 1,418,800 | 185,250 | May 2023 |
| 297 | healio.com | 8.09/10 | 327,700 | 105,720 | Sep 2025 |
| 298 | chicagobooth.edu | 8.09/10 | 62,900 | 23,293 | Sep 2025 |
| 299 | univ-amu.fr | 8.09/10 | 1,900 | 761 | Jul 2025 |
| 300 | libretexts.org | 8.08/10 | 6,200 | 2,036 | Jun 2026 |
Open Page Rank is the domain's authority score (0 to 10, from the open web link graph); the list is ordered by it and covers sites seen in recent crawls. Visits and keywords are estimated US organic search figures.
Download top 10,000 as CSV (zip) →
Columns: domain, Open Page Rank, first seen, last seen, industry (from the site's own structured data, blank when none).