A utility library for working with Temporal dates and times, providing helper functions for common date and time manipulations.
Documentation · npm · GitHub
npm install temporal-fnstemporal-fns v2+ uses the native Temporal global and ships ESM only.
- Node.js 26 or later (Temporal is enabled by default).
- Browsers / runtimes that expose the
Temporalglobal natively.
If you need to run on an older runtime, install and load a polyfill (for example temporal-polyfill) before importing this package. Pre-v2 releases bundled a polyfill — v2 leaves that choice to you.
import { startOfMonth, addBusinessDays, eachDayOfInterval } from "temporal-fns";
const today = Temporal.Now.plainDateISO();
startOfMonth(today);
addBusinessDays(today, 5);
eachDayOfInterval({ start: today, end: today.add({ days: 6 }) });See the full API documentation for detailed signatures and examples.
| Category | Functions |
|---|---|
| Period boundaries | startOfDay, endOfDay, startOfHour, endOfHour, startOfMinute, endOfMinute, startOfSecond, endOfSecond, startOfWeek, endOfWeek, startOfMonth, endOfMonth, startOfQuarter, endOfQuarter, startOfYear, endOfYear |
| Day-of-week navigation | nextDayOfWeek, previousDayOfWeek, firstDayOfWeekOfMonth, lastDayOfWeekOfMonth |
| Predicates | isWeekend, isBusinessDay, isFirstDayOfMonth, isLastDayOfMonth, isToday, isYesterday, isTomorrow, isPast, isFuture |
| Same-period predicates | isSameDay, isSameWeek, isSameMonth, isSameQuarter, isSameYear, isSameHour, isSameMinute, isSameSecond |
| Comparison & selection | compare, min, max, clamp, closestTo, closestIndexTo |
| Intervals | eachDayOfInterval, eachWeekOfInterval, eachMonthOfInterval, eachQuarterOfInterval, eachYearOfInterval, eachHourOfInterval, eachMinuteOfInterval, isWithinInterval, areIntervalsOverlapping, intervalToDuration |
| Business days | isBusinessDay, addBusinessDays, subBusinessDays, differenceInBusinessDays |
| Conversion | fromDate, toDate, getQuarter |
| Type helpers | Interval, ComparableTemporal, TemporalWithDate, TemporalWithTime, TemporalWithDateTime, TemporalWithYearMonth |
MIT