To adapt and localize times in the browser with JavaScript, developers can use the Date object's toLocaleString() method or the Intl.DateTimeFormat() method. However, these methods have drawbacks, such as displaying un-personalized content before JavaScript kicks in or failing to load on some devices. To overcome these challenges, Netlify Edge Functions provides a solution by allowing developers to use native JavaScript APIs within edge functions, eliminating the need for client-side JavaScript and server-side logic. By leveraging Edge Functions, developers can personalize timezones without introducing additional infrastructure, making it easier to adapt dates and times according to different locales and timezones in a virtual and remote-first world.