About
Day.js is a fast JavaScript date library that provides tools for parsing, validating, manipulating, and formatting dates. It offers a simple API and is lightweight for working with dates.
Pricing
Pricing Type
Open Source
Free tier available
Last checked: February 24, 2026
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Key Facts
Categories
Platforms
Mac
Windows
Linux
Company
Day.js
Founded
Founded in 2017
Country
Global
Language
English