react-native-super-calendar

A generic, themeable month / week / day calendar for React Native.

• 📆 Month grid plus day / 3-day / week / custom-N time-grids
• 🤏 Zoomable week/day grid: pinch on iOS & Android, Ctrl/Cmd + scroll on web (UI thread, no re-renders)
• ♾️ Virtualized, snap-paging months/weeks/days via @legendapp/list
• 🧩 Bring-your-own event type (CalendarEvent<T>) and a renderEvent escape hatch
• 🗓️ Date selection (single / multiple / range via useDateRange), disabled days, and a scrolling MonthList
• 🪝 Headless useMonthGrid hook to build a fully custom calendar
• 🎨 Fully themeable, with sensible defaults (no styling library required)
• 🌐 Runs on iOS, Android and web (web via react-native-web; see Web)

This is a ground-up reimagining inspired by the excellent react-native-big-calendar. It keeps the familiar month/week/day model but is built around Reanimated and modern list virtualization — trading framework-agnosticism for a richer, gesture-driven experience. It's not a fork; the API differs, and the name is an homage. 🙇

Already using react-native-big-calendar? The migration guide has a copy-paste prompt for your coding agent plus a manual prop mapping.

At a glance

Capability	react-native-super-calendar	react-native-big-calendar
Month / week / day / 3-day / custom / agenda	✅	✅
Generic event typing (CalendarEvent<T>)	✅	✅
Virtualized, snap-paged views	✅	❌ renders all dates
Pinch-to-zoom (native) / Ctrl-scroll (web)	✅	❌
Drag to move & resize events	✅	❌ (declined upstream)
Date selection (single / range / multiple)	✅ useDateRange + disabled days	❌
Headless grid hook (useMonthGrid)	✅	❌
Overlapping events	✅ side-by-side columns	⚠️ stacked / indented
Month paging fires onChangeDate	✅	⚠️ known gaps
Recurring events	✅ expandRecurringEvents	❌ expand them yourself
Time-zone display	✅ eventsInTimeZone	❌
Dark mode	✅ darkTheme preset	❌ bring your own palette
renderEvent across every mode & event type	✅	⚠️ breaks for all-day/multi-day
Web	✅ arrow-key paging, Ctrl-scroll zoom	⚠️ partial
Runtime dependencies	Reanimated + Gesture Handler + Legend List	dayjs + calendarize (lighter)

Legend: ✅ supported · ⚠️ partial or with known issues · ❌ not available. The last row is the honest trade-off: big-calendar has a smaller footprint and fewer native peers, so it can be the simpler choice when you don't need the gestures, virtualization, or the helpers above.

What it adds over react-native-big-calendar

• 🤏 Pinch-to-zoom time grid — row height is a Reanimated shared value, so zooming runs on the UI thread with zero React re-renders.
• ♾️ Virtualized, snap-paged views (via @legendapp/list) — swipe across years of dates, with native one-page paging (or opt into freeSwipe).
• 🧩 Generic events + render-prop component — CalendarEvent<T> carries your own fields, and renderEvent is a component (so it may use hooks) that receives the event box's live pixel height for progressive disclosure as the grid zooms.

Feature parity. It also covers the rest of react-native-big-calendar's surface: month / day / 3-day / week / custom N-day (and weekEndsOn partial-weeks) / agenda (schedule) modes, all-day events (lane + allDay flag, toggle the lane with showAllDayEventCell), multi-day clipping, minHour/maxHour, ampm (hour axis and event times), showTime, timeslots, hideHours, showWeekNumber, weekNumberPrefix, hourComponent, sortedMonthView, moreLabel, showAdjacentMonths, showSixWeeks, disableMonthEventCellPress, a default month weekday header (renderHeaderForMonthView), a custom month date badge (renderCustomDateForMonth), activeDate, per-event disabled, onPress/onLongPress for events, cells and date headers, onChangeDateRange, resetPageOnPressCell, swipeEnabled, verticalScrollEnabled, showVerticalScrollIndicator, an agenda itemSeparatorComponent, eventCellStyle, calendarCellStyle, a headerComponent slot, date-fns locale, right-to-left column order (isRTL), and theming. Text styling that big-calendar exposes via calendarCellTextStyle is covered by CalendarTheme.text; overlapping events are laid out in side-by-side columns automatically.

Trade-offs (where react-native-big-calendar may suit you better)

• It's opinionated about peers: Reanimated, Gesture Handler and @legendapp/list are required. react-native-big-calendar is more self-contained (no Reanimated/Gesture Handler).
• RTL is cosmetic (isRTL reverses the day-column order, like big-calendar's): the hour gutter stays on the left and paging follows the system scroll direction. Enable React Native's I18nManager for full RTL.

Relationship to flash-calendar

The date-picker surface (MonthList, useDateRange, and the headless useMonthGrid) is inspired by flash-calendar, an excellent headless date picker for React Native. If you only need date selection, flash-calendar is the lighter, more focused choice: a dedicated, FlashList-based picker with no event model. react-native-super-calendar folds picking into a full gesture calendar, so one library covers events and date selection, at the cost of the Reanimated, Gesture Handler, and Legend List peers. Pick flash-calendar for a standalone picker; pick this when you also need the event views.

Install

npm install react-native-super-calendar

Peer dependencies

The full calendar relies on the following being installed in your app:

npm install react-native-reanimated react-native-worklets react-native-gesture-handler @legendapp/list date-fns

Make sure Reanimated and Gesture Handler are set up per their own docs (Babel plugin, GestureHandlerRootView at the root of your app).

These are declared as optional peers so web-only installs (the /dom and /picker entry points) aren't asked to install React Native packages they don't use. The full calendar still needs them: because its components import Reanimated and Gesture Handler directly, a missing one surfaces as a clear Metro Unable to resolve "react-native-reanimated" build error rather than a silent failure, so install the line above when you use Calendar or the time grid.

Picker only? Skip Reanimated

If you only need date selection, import it from the react-native-super-calendar/picker entry point. It contains the month grid, selection, and the headless useMonthGrid, with none of the timetable code and no Reanimated dependency, so it works on every bundler (Metro included) without shipping the week/day grid. A picker-only app installs just:

npm install react-native-gesture-handler @legendapp/list date-fns

import { MonthList, useDateRange } from "react-native-super-calendar/picker";

react-native-reanimated and react-native-worklets are declared as optional peers, so this entry point won't pull them in. (Metro doesn't tree-shake the main barrel, so the subpath is what guarantees the timetable code is left out.)

React DOM (web without React Native)

For a plain react-dom app (no React Native, no react-native-web), import the react-native-super-calendar/dom entry point. It ships real DOM components, MonthView, MonthList (the date picker), and TimeGrid (day/week/N-day, with Ctrl/⌘-scroll and pinch zoom plus drag to move and resize), built on the same pure core and Legend List's DOM renderer. A web app installs just:

npm install react react-dom @legendapp/list date-fns

import { MonthList, TimeGrid, useDateRange } from "react-native-super-calendar/dom";

The React Native peers (react-native, react-native-gesture-handler, react-native-reanimated, react-native-worklets) are all optional, so a web install pulls none of them. Styling is plain inline styles driven by a theme prop (defaultDomTheme / darkDomTheme), no stylesheet import required.

A selected range renders as a centered rounded "pill" band by default (its height and colour are the rangeBandHeight / rangeBackground theme tokens). Pass fillCellOnSelection to MonthView / MonthList to fill the whole cell edge to edge instead.

Headless core (any renderer)

Want the date math and selection model without any of the built-in UI? The react-native-super-calendar/headless entry point exports just the pure pieces, buildMonthGrid / useMonthGrid, useDateRange and the selection helpers, layoutDayEvents, and the date utilities, with zero React Native, Reanimated, or Legend List imports. It's what the DOM components are built on, and it works in any React renderer (react-dom, Solid via its React compat, your own).

import { buildMonthGrid, nextDateRange } from "react-native-super-calendar/headless";

Usage

import { useState } from "react";
import { Calendar, type CalendarEvent } from "react-native-super-calendar";

type MyEvent = { id: string; color: string };

const events: CalendarEvent<MyEvent>[] = [
  {
    id: "1",
    color: "#1F6FEB",
    title: "Lecture",
    start: new Date(2026, 5, 19, 10, 0),
    end: new Date(2026, 5, 19, 11, 30),
  },
];

export function MyCalendar() {
  const [mode, setMode] = useState<"month" | "week" | "day">("week");
  const [date, setDate] = useState(new Date());

  return (
    <Calendar
      mode={mode}
      date={date}
      events={events}
      weekStartsOn={1}
      onChangeDate={setDate}
      onPressEvent={(event) => console.log(event.id)}
      onPressDay={(day) => {
        setDate(day);
        setMode("day");
      }}
    />
  );
}

Custom events

The built-in renderer draws a simple titled box. Pass renderEvent — a React component, not a callback — to take full control. Because it's rendered as a component, it may use hooks. The same renderer is used in every mode — month chips, the all-day lane, the timed grid and the schedule list — and always receives isAllDay (plus continuesBefore/continuesAfter for clipped multi-day segments on the grid), so one component covers them all. On the week/day grid you also receive boxHeight, a Reanimated shared value tracking the live pixel height of the box (driven by pinch-zoom), so you can reveal detail progressively without re-rendering:

import Animated, { useAnimatedStyle } from "react-native-reanimated";
import { Pressable, Text } from "react-native";
import type { RenderEventArgs } from "react-native-super-calendar";

// Define the component once (don't inline it, or it remounts every render).
function MyEvent({ event, boxHeight, onPress }: RenderEventArgs<MyEvent>) {
  const detailStyle = useAnimatedStyle(() => ({
    display: (boxHeight?.value ?? Infinity) >= 84 ? "flex" : "none",
  }));
  return (
    <Pressable style={{ flex: 1, backgroundColor: event.color }} onPress={onPress}>
      <Text>{event.title}</Text>
      <Animated.View style={detailStyle}>
        <Text>{event.start.toLocaleTimeString()}</Text>
      </Animated.View>
    </Pressable>
  );
}

<Calendar /* ... */ renderEvent={MyEvent} />;

The built-in renderer hard-clips a title that overflows its box. Pass ellipsizeTitle to <Calendar> for a trailing ellipsis (…) instead.

Drag to move and resize

Pass onDragEvent to make events draggable on the week/day grid. Move an event (long-press it on native, click-drag it on web) — drag vertically to change the time, horizontally to move it to another day (within the visible range) — or drag the grip at its bottom edge to resize. The handler receives the new start/end, snapped to dragStepMinutes (default 15) — update your own event state in response. On web a plain click still selects and right-click still fires, so drag coexists with both:

<Calendar
  /* ... */
  onDragEvent={(event, start, end) =>
    setEvents((prev) => prev.map((e) => (e.id === event.id ? { ...e, start, end } : e)))
  }
/>

Reject a drop. Return false from onDragEvent to refuse the new placement — the event snaps back to where it started. Use it to forbid overlaps, out-of-bounds slots, or locked events:

onDragEvent={(event, start, end) => {
  if (event.locked || overlapsAnother(event, start, end)) return false;
  setEvents((prev) => prev.map((e) => (e.id === event.id ? { ...e, start, end } : e)));
}}

Haptics on grab. onDragStart fires the instant an event is picked up for a move or resize, before anything is committed. The library stays expo-free, so bring your own haptics, e.g. expo-haptics:

import * as Haptics from "expo-haptics";

<Calendar
  /* ... */
  onDragStart={() => {
    void Haptics.impactAsync(Haptics.ImpactFeedbackStyle.Medium);
  }}
/>;

Drag to create. Pass onCreateEvent to sweep out a new event on empty grid space: long-press and drag on native, click-drag on web. The handler receives the snapped start/end on release (a stationary press yields a one-step range) — create your own event in response. On native it supersedes onLongPressCell on empty space; on web, dragging empty space creates instead of scrolling (use the wheel to scroll), matching desktop calendars, and Escape cancels an in-progress sweep before it commits.

<Calendar
  /* ... */
  onCreateEvent={(start, end) =>
    setEvents((prev) => [...prev, { id: makeId(), title: "New event", start, end }])
  }
/>

Recurring events

Give an event a recurrence rule and expand it into concrete occurrences for the range you're showing with expandRecurringEvents. The calendar doesn't expand recurrences itself, so you control the window (and can memoize it):

import { Calendar, expandRecurringEvents } from "react-native-super-calendar";

const events = [
  // Every weekday standup, 20 occurrences:
  {
    title: "Standup",
    start,
    end,
    recurrence: { freq: "weekly", weekdays: [1, 2, 3, 4, 5], count: 20 },
  },
];

const visible = expandRecurringEvents(events, rangeStart, rangeEnd);
<Calendar /* ... */ events={visible} />;

Rules support freq (daily/weekly/monthly/yearly), interval, count, until, and weekdays (for weekly). Each occurrence keeps the original duration and fields; non-recurring events pass through unchanged.

Date selection

Date picking lives on MonthList, the vertically-scrolling month list (the horizontally-paged month view is for browsing events, not picking). The selection renders as a background band across the span, with no per-day circle, so it stays distinct from the "today" badge. For ranges, the useDateRange hook owns the state machine: the first press sets the start, the second sets the end (auto-swapping if earlier), a third press starts over. Tap two days, or long-press and drag to sweep a range (the list auto-scrolls at the edges, so a range can span months):

import { MonthList, useDateRange } from "react-native-super-calendar";

function RangePicker() {
  const [date, setDate] = useState(new Date());
  const { range, onPressDate, selectRange } = useDateRange();

  return (
    <MonthList
      date={date}
      weekStartsOn={1}
      selectedRange={range ?? undefined}
      onPressDay={onPressDate}
      onSelectDrag={selectRange}
      onChangeVisibleMonth={setDate}
    />
  );
}

Use selectedDates to mark discrete days instead of a range. The band colour is the rangeBackground theme token.

Disabled days. minDate, maxDate and isDateDisabled render days dimmed, ignore taps, and keep them out of any selection (drag included). Hand the same constraints to useDateRange so a blocked day never opens a range:

const minDate = useMemo(() => new Date(), []); // no past dates
const { range, onPressDate, selectRange } = useDateRange({ minDate });

<MonthList
  date={date}
  weekStartsOn={1}
  selectedRange={range ?? undefined}
  minDate={minDate}
  isDateDisabled={(d) => d.getDay() === 0} // also block Sundays
  onPressDay={onPressDate}
  onSelectDrag={selectRange}
/>;

Month list

MonthList is the continuous, virtualized vertical scroll of months behind the picker above (a month title then its grid, under a fixed weekday header), sized per month with no adjacent-month fill. It also renders events: pass events, and optionally a renderEvent. Both renderEvent and keyExtractor default, so an events-free picker needs neither:

import { MonthList } from "react-native-super-calendar";

<MonthList
  date={new Date()}
  events={events}
  weekStartsOn={1}
  renderEvent={MyEvent}
  keyExtractor={(event) => event.id}
  onChangeVisibleMonth={setDate}
/>;

Headless month grid

Want your own day-cell markup but not the date maths? useMonthGrid(month, options) returns the weeks, the weekday headers, and per-day state (isToday/isSelected/isInRange/isDisabled/isCurrentMonth/…) for you to render however you like:

import { useMonthGrid } from "react-native-super-calendar";

const { weeks, weekdays } = useMonthGrid(month, { weekStartsOn: 1, selectedRange: range });
// weekdays -> header cells; weeks[].days -> your own <DayCell />

Need it outside React (tests, exports)? Call the pure buildMonthGrid(month, options); the hook is just a memoized wrapper. buildMonthWeeks(month, weekStartsOn) returns the raw Date[][].

Time zones

Events lay out from their local wall-clock time. To display them in a specific IANA zone regardless of the device, run them through eventsInTimeZone (or a single date through toZonedTime). It's DST-correct via Intl:

import { Calendar, eventsInTimeZone } from "react-native-super-calendar";

// Render every event at its New York wall-clock time.
<Calendar /* ... */ events={eventsInTimeZone(events, "America/New_York")} />;

The returned dates are for display only — they carry the zone's wall clock, not the original instant, so keep your source events around for editing/saving.

Theming

<Calendar
  // ...
  theme={{
    colors: { todayBackground: "#E5484D", nowIndicator: "#E5484D" },
    text: { dayNumber: { fontSize: 24, fontWeight: "800" } },
  }}
/>

See CalendarTheme for the full set of tokens. Anything you omit falls back to defaultTheme.

For dark mode, pass the built-in darkTheme (switch on the system scheme with useColorScheme()):

import { Calendar, darkTheme, defaultTheme } from "react-native-super-calendar";
import { useColorScheme } from "react-native";

const scheme = useColorScheme();
<Calendar /* ... */ theme={scheme === "dark" ? darkTheme : defaultTheme} />;

Modes

mode is one of month, week, day, 3days, custom, or schedule. For custom, set numberOfDays (e.g. mode="custom" numberOfDays={5} for a work-week). Day/3-day/custom views page by their column count; week pages by the calendar week. schedule is a vertical, day-grouped agenda list of the events you pass (no time grid).

Month view

Each day cell shows as many event chips as its height allows and collapses the rest into a +N more label (tap it via onPressMore). The fit is measured at runtime, so taller grids (fewer week rows, larger screens) show more.

<Calendar mode="month" /* ... */ />          // auto-fit (default)
<Calendar mode="month" maxVisibleEventCount={3} /* ... */ /> // fixed cap

Pass maxVisibleEventCount for a fixed cap instead — recommended when you pass a custom renderEvent, since auto-fit assumes the built-in chip height. Customize the overflow text with moreLabel (e.g. "+{moreCount}").

Localization

Pass a date-fns Locale to localize weekday and date labels:

import { fr } from "date-fns/locale";

<Calendar /* ... */ locale={fr} weekStartsOn={1} />;

Pass isRTL to reverse the day-column order in every view (month grid, week/day grid and the all-day lane). It's cosmetic — the hour gutter stays on the left and paging follows the system scroll direction — so enable React Native's I18nManager alongside it for full right-to-left behaviour.

<Calendar /* ... */ isRTL locale={ar} weekStartsOn={6} />

Week/day grid options

<Calendar
  mode="week"
  // ...
  minHour={7} // window the grid to 07:00–21:00
  maxHour={21}
  ampm // 12-hour hour labels ("7 AM")
  onPressCell={(date) => createEventAt(date)} // tap empty space -> date+time
/>

• minHour / maxHour clamp the visible hours (defaults 0 / 24); events and the now-line outside the window are hidden, and the initial scroll is adjusted.
• ampm switches hour labels to 12-hour AM/PM (default 24h).
• onPressCell(date) fires when empty grid space is tapped, with the date+time under the touch — handy for "create event". (Event taps still go to onPressEvent.)
• Long-press mirrors every tap: onLongPressEvent(event), onLongPressCell(date) (week/day), and onLongPressDay(date) (month). All optional.
• All-day events render in a lane above the time grid (and as chips in month cells), excluded from the timed columns. Mark an event allDay: true, or it's inferred when it spans whole days (midnight-to-midnight). renderEvent receives isAllDay so you can style the chip. The lane is hidden when there are none.
• freeSwipe (default false) controls paging: by default one day/week/month moves per swipe; set it to allow a fling to carry across several pages (still snapping to a page boundary). Applies to all modes.

Business hours

Pass businessHours to tint the closed hours on the week/day grid. It's a function of the day, so open hours can vary (and weekends can read as closed) — return { start, end } (hours, fractions allowed) to shade outside that range, or null to shade the whole day. The tint colour is the theme's outsideHoursBackground.

<Calendar
  /* ... */
  businessHours={(date) => {
    const weekday = date.getDay();
    if (weekday === 0 || weekday === 6) return null; // weekends closed
    return { start: 9, end: 17 };
  }}
/>

Web

The calendar runs on react-native-web; its dependencies (@legendapp/list v3, Reanimated and Gesture Handler) all support web. Add the web peers to your app:

npx expo install react-dom react-native-web @expo/metro-runtime

All modes render and navigate. Two touch gestures are remapped for web: horizontal swipe paging becomes ← / → arrow-key paging (previous / next page), and pinch-to-zoom on the week/day grid becomes Ctrl/Cmd + scroll. The runnable example/ builds with expo start --web.

If a renderEvent wraps events in a portaling overlay (a context menu, popover, etc.) from a UI library, portal it into your app's React root, not document.body. react-native-web registers React's event delegation on the root element (#root under Expo), so an overlay mounted outside it renders correctly but its click handlers never fire. Most libraries take a container prop for this; the example's context menu portals into #root for exactly this reason.

Components

<Calendar> is the batteries-included entry point. The building blocks it wraps are also exported for advanced layouts:

Export	Description
Calendar	Top-level component; switches between month/week/day.
MonthView	A single month grid.
MonthPager	Horizontally-paged, virtualized months.
MonthList	Vertically-scrolling, continuous list of months.
TimeGrid	Paged, pinch-zoomable week/day time-grid.
DefaultEvent	The built-in event renderer.
useDateRange	Range-selection state machine for the month view.
useMonthGrid	Headless grid data (weeks + per-day state) for custom UIs.
useCalendarTheme	Read the active theme inside a custom renderer.

Notes & limitations

• Multi-day events are supported: pass one event and it appears on every day it spans. On the week/day grid each day shows the clipped segment (so a 23:00→01:00 event renders 23:00–24:00, then 00:00–01:00), and renderEvent receives continuesBefore/continuesAfter so you can draw continuation hints. All-day events (an explicit allDay flag or a midnight-to-midnight span) render in a dedicated lane above the time grid.
• weekStartsOn defaults to 0 (Sunday). Pass 1 for Monday-first.
• Controlled date. The calendar is controlled: echo onChangeDate back into the date prop, or paging and the "today" realign won't track.
• External cellHeight. If you own cellHeight, drive zoom through the pinch gesture. Programmatic writes outside a pinch won't propagate to off-screen pages until the next gesture settles.
• Stable props. Pass stable renderEvent/keyExtractor/on* references (module scope or useCallback) so the memoized inner views can skip renders.

Example app

A runnable Expo demo lives in example/ — month/week/day modes, a multi-day event, drill-into-day on tap, and one-page paging.

cd example
pnpm install
pnpm expo run:ios   # or: pnpm expo run:android

It consumes the library straight from ../src (via the example's metro.config.js), so edits to the package hot-reload into the demo. A custom dev build is required (Reanimated worklets aren't available in Expo Go).

License

MIT