JavaScript Date Libraries Compared: Luxon vs date-fns vs Day.js vs Temporal—When to Use Each

Compare Luxon, date-fns, Day.js, and Temporal. Bundle size, time zone support, API design, and which to pick for your JavaScript project in 2026.

The Epoch Calculator team

We build practical, free time and date tools at epochcalc.com — every calculation runs in your browser using IANA tzdb via Luxon, so DST and zone math are correct by construction.