Mastering JavaScript Dates and Times

<p>Managing dates and times in JavaScript is notoriously tricky, often leading to subtle bugs that only surface once an application hits production. To help you master this fundamental skill, the freeCodeCamp.org YouTube channel has just published a comprehensive course on the topic. Tapas created this course.</p> <p>This course covers the full spectrum of time handling in modern web development:</p> <ul> <li><p>Core Concepts: Understand epoch time, time zones, and the real reasons why time is relative.</p> </li> <li><p>JavaScript Date Object: Learn how the native Date object works, its common pitfalls, and how to avoid bugs related to mutation and zero-indexed months.</p> </li> <li><p>The Power of INTL: Master the underrated Internationalization (INTL) API to format dates, times, and relative time (e.g., "3 days ago") without relying on heavy third-party libraries.</p> </li> <li><p>The Future with Temporal: Get an introduction to the new Temporal API—the modern, immutable replacement for the legacy Date object that finally brings proper time zone and DST support to JavaScript.</p> </li> <li><p>Proactive Strategies: Learn how to avoid silent production bugs caused by daylight saving time (DST) and incorrect time zone handling.</p> </li> </ul> <p>By breaking the topic down into logical parts, this course ensures you understand <em>why</em> time related issues happen, not just how to patch them.</p> <p>You can watch the full course on <a href="https://youtu.be/2WJ-ut_XEYQ">the freeCodeCamp.org YouTube channel</a> (2-hour watch).</p> <div class="embed-wrapper"><iframe width="560" height="315" src="https://www.youtube.com/embed/2WJ-ut_XEYQ" style="aspect-ratio: 16 / 9; width: 100%; height: auto;" title="YouTube video player" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen="" loading="lazy"></iframe></div>