You can further reduce that to 0kb by using window.Intl . You get locale and timezone aware date formatting, built-in on all modern browsers. The API is pretty

You can further reduce that to 0kb by using window.Intl . You get locale and timezone aware date formatting, built-in on all modern browsers. The API is pretty nice! https://caniuse.com/#feat=internationalization https://caniuse.com/#feat=internationalization