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Day.js

88,938

companies run it, 0.16% of 54,527,857 in the index. Landing 12 Sept 2026.

Hosts: 169,571 live hosts run it, of 191,809,695 hosts in the index, 0.09%. A host is a website, not a company.

Companies by month

Companies, monthly, on the fixed panel of sites crawled since 2020of 54,527,857 in the indexlanding 12 Sept 2026

88,938 at Sept 26; 89,293 twelve months earlier, -355, -0.4% on the fixed panel; the series starts January 2021 because the panel is anchored at 31 Dec 2020

The 69 numbers in this chart
MonthCompaniesObserved on the panel
2021-018,592874
2021-028,592874
2021-038,592874
2021-048,593874
2021-058,593874
2021-068,593874
2021-078,593874
2021-088,599875
2021-098,605875
2021-108,610876
2021-118,615876
2021-128,621877
2022-018,628878
2022-028,634878
2022-038,642879
2022-048,650880
2022-058,659881
2022-068,667881
2022-078,675882
2022-088,683883
2022-098,688884
2022-108,691884
2022-118,695884
2022-128,699885
2023-018,702885
2023-028,705885
2023-038,709886
2023-0411,4091,160
2023-0513,3801,361
2023-0615,3511,561
2023-0717,3221,762
2023-0819,2931,962
2023-0921,2642,163
2023-1023,2332,363
2023-1125,2032,563
2023-1227,1742,764
2024-0129,1442,964
2024-0231,1243,165
2024-0334,2433,483
2024-0437,2033,784
2024-0537,4673,811
2024-0638,4833,914
2024-0739,4964,017
2024-0840,5514,124
2024-0942,6584,339
2024-1046,2164,700
2024-1150,2405,110
2024-1254,1305,505
2025-0158,6415,964
2025-0262,7776,385
2025-0366,9026,804
2025-0470,2557,145
2025-0573,6357,489
2025-0677,8427,917
2025-0782,0118,341
2025-0886,4178,789
2025-0989,2939,082
2025-1091,1099,266
2025-1191,4749,303
2025-1291,3749,293
2026-0191,4369,299
2026-0291,6839,325
2026-0392,5449,412
2026-0492,9159,450
2026-0592,9229,451
2026-0693,0989,469
2026-0792,1199,369
2026-0890,9179,247
2026-0988,9389,045

Both denominators, and a third

Shares of the same 88,938each row a different wholelanding 12 Sept 2026

Denominator
Companies
Share
companies in the index
54,527,857
0.16%
companies running anything in JavaScript Libraries
40,118,208
0.22%
companies running anything in General JavaScript utilities
18,294,596
0.49%

Three wholes, three shares of one count: a share travels with its whole, never alone. Against the last of them, Day.js is rank 26 of 87 technologies in General JavaScript utilities.

Open as a segment

88,938 companies; add a country, a sector or a band on the segment page. Counting is free.

/companies/tech-day-js

Open the segment

Catalogue record

As recorded in the cataloguetaxonomy release tax-2026.10last discovered 10 Sept 2026

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

Day.js is an open-source JavaScript date and time manipulation library with a Moment.js-compatible API in a small footprint. It is used by front-end developers to handle formatting and operations on dates in the browser or Node.js.

Kindlibrary
VendorDay.js project
Slugday-js
Deploymentself-hosted
Pricingfree
Open sourceyes
First discovered2019-10-28
Last discovered2026-09-10
Taxonomy releasetax-2026.10