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Sites built with Day.js

Lightweight JavaScript library for parsing, validating, and formatting dates.

#66 of 832 in Javascript Library First seen: Jun 25, 2026 Last seen: Aug 20, 2026 Website: day.js.org
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1,025 sites

1,022 found by StackScope, 3 via launch platforms

StackScope Wider Web 1,012 StackScope Discovery (Indie) 10 Hacker News 2 PeerPush 1
  • StackScope Wider Web 1,012
  • StackScope Discovery (Indie) 10
  • Hacker News 2
  • PeerPush 1
View: All sites All launches Launch platforms StackScope Discovery StackScope Wider Web
Last 7 days 0.1% +0.0pp
Most used with Cloudflare, Google Fonts, jsDelivr
Top product types E-commerce, Games, Health

Day.js has been detected on 1,025 launches we've crawled, with 587 of those in August 2026 (0.1% of the month's launches so far). The 7-day rolling share is 0.1%, roughly steady week on week. Most recent detection: 홈 | CCM LIFE, today.

It's most commonly paired with Cloudflare, Google Fonts, and jsDelivr. By product type, the launches using it are most often E-commerce (40%), Games (15%), and Health (9%). By estimated origin, Iran (23%) and India (22%) lead close together. By domain ending, launches using it are 10.9 times as likely as the average launch to live on a .store domain.

What kind of products ship with Day.js

247 launches

E-commerce
40.49%
Games
14.98%
Health
9.31%
Content
6.88%
Education
6.07%
Developer Tools
4.45%
Social
4.05%
Finance
3.64%
Marketing
3.64%
Productivity
3.64%
Design
1.21%
AI
0.81%
Crypto
0.40%
Directory
0.40%

Domain endings using Day.js

1,025 sites

  • .com 52.59%
  • .store 6.05%
  • .online 5.85%
  • .in 5.17%
  • .co 4.20%
  • .net 2.73%
  • .me 2.54%
  • .dev 2.44%
  • .org 2.15%
  • .ca 1.95%
  • .site 1.56%
  • .uk 1.46%
  • .xyz 1.46%
  • .us 1.37%

Country-coded domains

258 of 1,025 sites. Mostly read from the domain ending, so the US is undercounted.

  • Iran Iran 23.26%
  • India India 22.09%
  • China China 9.30%
  • Canada Canada 7.75%
  • Japan Japan 6.98%
  • United Kingdom United Kingdom 5.81%
  • United States United States 5.04%
  • New Zealand New Zealand 2.71%
  • Switzerland Switzerland 2.33%
  • Australia Australia 1.55%
  • Germany Germany 1.55%
  • France France 1.55%
  • South Korea South Korea 1.55%
  • Brazil Brazil 1.16%

Share of new sites using Day.js

Each dot is one launch day. Line is the 7-day rolling average. Chart starts at first detection.

0.1%
last 7 days
+0.0pp vs prior week
0.1%
August so far
587 of 799,254 sites
1,025
sites all time
since Jun 2026
Day.js daily detection trend Before 8 July 2026: launch platforms only. We began crawling the wider web on this date, so the cohort this share is measured against changes here. 5% 2% 0% Jul Aug Jun 24, 2026: Improved detection coverage for this technology. Jul 1, 2026: Adoption figures now count launches from launch platforms. Use the source view to include StackScope Discovery. Jun 18 · 0 / 674 = 0.0% Jun 19 · 0 / 546 = 0.0% Jun 20 · 0 / 443 = 0.0% Jun 21 · 0 / 383 = 0.0% Jun 22 · 0 / 575 = 0.0% Jun 23 · 0 / 901 = 0.0% Jun 24 · 0 / 737 = 0.0% Jun 25 · 1 / 618 = 0.2% Jun 26 · 0 / 534 = 0.0% Jun 27 · 0 / 431 = 0.0% Jun 28 · 0 / 383 = 0.0% Jun 29 · 0 / 501 = 0.0% Jun 30 · 0 / 801 = 0.0% Jul 1 · 0 / 795 = 0.0% Jul 2 · 0 / 604 = 0.0% Jul 3 · 0 / 497 = 0.0% Jul 4 · 0 / 411 = 0.0% Jul 5 · 1 / 367 = 0.3% Jul 6 · 0 / 551 = 0.0% Jul 7 · 0 / 1167 = 0.0% Jul 8 · 3 / 12566 = 0.0% Jul 9 · 14 / 23710 = 0.1% Jul 10 · 8 / 22515 = 0.0% Jul 11 · 7 / 15953 = 0.0% Jul 12 · 21 / 20263 = 0.1% Jul 13 · 26 / 20891 = 0.1% Jul 14 · 17 / 20371 = 0.1% Jul 15 · 15 / 17211 = 0.1% Jul 16 · 3 / 14236 = 0.0% Jul 17 · 8 / 19685 = 0.0% Jul 18 · 5 / 22626 = 0.0% Jul 19 · 10 / 25896 = 0.0% Jul 20 · 8 / 22525 = 0.0% Jul 21 · 7 / 21595 = 0.0% Jul 22 · 12 / 23155 = 0.1% Jul 23 · 7 / 16803 = 0.0% Jul 24 · 4 / 12779 = 0.0% Jul 25 · 2 / 8912 = 0.0% Jul 26 · 14 / 19900 = 0.1% Jul 27 · 31 / 33717 = 0.1% Jul 28 · 23 / 37985 = 0.1% Jul 29 · 93 / 49845 = 0.2% Jul 30 · 39 / 43663 = 0.1% Jul 31 · 51 / 50735 = 0.1% Aug 1 · 26 / 50176 = 0.1% Aug 2 · 36 / 49478 = 0.1% Aug 3 · 27 / 47966 = 0.1% Aug 4 · 20 / 37154 = 0.1% Aug 5 · 20 / 32502 = 0.1% Aug 6 · 24 / 36292 = 0.1% Aug 7 · 30 / 37650 = 0.1% Aug 8 · 34 / 39504 = 0.1% Aug 9 · 38 / 33949 = 0.1% Aug 10 · 13 / 28595 = 0.0% Aug 11 · 20 / 31768 = 0.1% Aug 12 · 23 / 33055 = 0.1% Aug 13 · 42 / 49316 = 0.1% Aug 14 · 44 / 50996 = 0.1% Aug 15 · 45 / 50949 = 0.1% Aug 16 · 47 / 51251 = 0.1% Aug 17 · 21 / 40567 = 0.1% Aug 18 · 50 / 52300 = 0.1% Aug 19 · 27 / 45786 = 0.1%
Jun 18, 2026 63 days Aug 19, 2026

The shaded part of the chart is measured against a different set of sites. Until 8 July 2026 we only tracked launches from launch platforms; from that date we crawl the wider web as well. The share is a proportion of whatever we were tracking at the time, so it can step at that line without the technology itself changing. For a single continuous measure, switch to launch platforms.

How StackScope detects technologies

⋮ Jun 24, 2026: Improved detection coverage for this technology.

⋮ Jul 1, 2026: Adoption figures now count launches from launch platforms. Use the source view to include StackScope Discovery.

Javascript Library leaders

Tool % of launches % of category
#1 ▲1 jQuery 12.78% 32.45%
#2 ▼2 Motion 7.41% 18.80%
#3 ▲1 React Router 7.24% 18.37%
#4 – TanStack Router 4.26% 10.82%
#5 ▲5 Swiper 3.15% 7.98%
…
#66 ▲66 Day.js Current page 0.07% 0.18%

Percentages show adoption among indie launches: the share of all analysed launches, and of launches using any Javascript Library tool.Day.js is typically used alongside jQuery rather than instead of it.Among July launches it ranked #62 in Javascript Library, up from #128 in June. All 832 in Javascript Library →

Often used with

Tool Launches
Cloudflare 4
Google Fonts 3
jsDelivr 3
Cloudflare Bot Management 3
jQuery 2

Tools most often detected on the same launches as Day.js.

Recent launches we can show

13 of the 1,025 sites using Day.js are product launches we list individually. The other 1,012 are sites we found crawling the wider web: they count towards the figures above, but we do not publish them one by one. How StackScope Discovery works

홈 | CCM LIFE Aug 18, 2026 海基智能机器人—提供全球智慧海滩解决方案 - AI智能，让海滩更清洁 Aug 15, 2026 Spesifik Gadget Aug 15, 2026 抠图鸭 - 专业抠图，轻松高效 Aug 13, 2026 China BeatScape Dance Media Aug 13, 2026 Content FreeConverter — Free Online PDF, Image, Text & Developer Tools Aug 5, 2026 Productivity Wozzim - Car Wash · Garage · Laundry Platform Jul 31, 2026 Productivity 구름막 - 동료 지지 커뮤니티 Jul 28, 2026 Kilofy : Expédition transfrontalière entre particuliers à prix abordable | Économisez 50 % Jul 26, 2026 Screenshot of Watolls, a launch using Day.js Watolls Jul 12, 2026 · score 5.9 DRG Logs - Deep Rock Galactic Mission Records & Stats Jul 9, 2026 Screenshot of Slate, a launch using Day.js Slate Jul 5, 2026 · score 7.6 Marketing

Showing the most recent 12 of 13.

The StackScope API serves all 1,025 sites using Day.js, filterable and exportable, from £15 a month.

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