Luxon
Luxon is a library for working with dates and times in JavaScript.
DateTime.now().setZone("America/New_York").minus({ weeks: 1 }).endOf("day").toISO();
Upgrading to 3.0
Features
- DateTime, Duration, and Interval types.
 - Immutable, chainable, unambiguous API.
 - Parsing and formatting for common and custom formats.
 - Native time zone and Intl support (no locale or tz files).
 
Download/install
Documentation
Development
See contributing.