Luxon is a library for working with dates and times in Javascript.

DateTime.local().setZone('America/New_York').minus({ weeks: 1 }).endOf('day').toISO();

• 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 instructions

• General documentation
• API docs
• Quick tour
• For Moment users
• Why does Luxon exist?
• A quick demo

See contributing.