JavaScript Temporal Is Coming: A Simpler Way to Work With Dates
Published on Apr 17, 2025
•
3 min read
🕰️ JavaScript Temporal Is Coming: A Simpler Way to Work With Dates
🔗Handling dates and times in JavaScript has always been... frustrating. But that’s about to change with Temporal, a new built-in object for date and time management.
Browser support is still experimental, but developers can already explore this modern and powerful API.
🤔 Why Do We Need Temporal?
🔗JavaScript’s existing Date
object was created in 1995 and hasn’t aged well. It:
- Only supports local time and UTC
- Doesn’t handle time zones well
- Is unreliable when parsing dates
- Is mutable, which can lead to bugs
Because of these issues, most developers use libraries like Moment.js or date-fns.
Temporal aims to fix all of this with:
- Time zone support
- Reliable parsing
- Immutable objects
- Better date math (like DST and calendar changes)
📚 What Does Temporal Offer?
🔗Temporal introduces new classes for different types of date/time work:
| Use Case | Temporal Class |
|----------|----------------|
| Time durations | Temporal.Duration
|
| Exact moments in time | Temporal.Instant
|
| Date/time with time zone | Temporal.ZonedDateTime
|
| Plain (no time zone) values | Temporal.PlainDate
, Temporal.PlainTime
, etc. |
| Current time | Temporal.Now
|
✨ Example 1: Get the Current Date and Time
🔗1const dateTime = Temporal.Now.plainDateTimeISO();2console.log(dateTime); // e.g., 2025-01-22T11:46:36.14434const nyTime = Temporal.Now.plainDateTimeISO("America/New_York");5console.log(nyTime); // e.g., 2025-01-22T05:47:02.555
🧧 Example 2: Find the Next Chinese New Year
🔗1const chineseNewYear = Temporal.PlainMonthDay.from({2 monthCode: "M01",3 day: 1,4 calendar: "chinese",5});67const currentYear = Temporal.Now.plainDateISO().withCalendar("chinese").year;8let nextCNY = chineseNewYear.toPlainDate({ year: currentYear });910if (Temporal.PlainDate.compare(nextCNY, Temporal.Now.plainDateISO()) <= 0) {11 nextCNY = nextCNY.add({ years: 1 });12}1314console.log(`Next Chinese New Year: ${nextCNY.withCalendar("iso8601").toLocaleString()}`);
🕓 Example 3: Calculate Time Until a Launch
🔗1const launch = Temporal.Instant.fromEpochMilliseconds(1851222399924);2const now = Temporal.Now.instant();3const duration = now.until(launch, { smallestUnit: "hour" });45console.log(`Launch in: ${duration.toString()}`); // PT31600H
Note: Formatting of durations may differ across browsers right now.
📊 Example 4: Sort Time Durations
🔗1const durations = [2 Temporal.Duration.from({ hours: 1 }),3 Temporal.Duration.from({ hours: 2 }),4 Temporal.Duration.from({ hours: 1, minutes: 30 }),5 Temporal.Duration.from({ hours: 1, minutes: 45 }),6];78durations.sort(Temporal.Duration.compare);9console.log(durations.map(d => d.toString()));10// [ 'PT1H', 'PT1H30M', 'PT1H45M', 'PT2H' ]
🧪 Browser Support & Trying It Out
🔗Temporal is still in experimental stages:
- Firefox: Available in Nightly (enable
javascript.options.experimental.temporal
) - Chrome & Safari: In development
You can also try it now using the @js-temporal/polyfill
and test examples in the console.
🎉 Final Thoughts
🔗Temporal is a game-changer for working with time in JavaScript. It:
- Solves major issues with the old Date API
- Supports time zones and different calendars
- Offers powerful and flexible new methods
Explore more in the MDN Temporal docs — they’re packed with examples!
Now is the perfect time to learn Temporal and level up your JS time skills ⏳