---
title: "Javascript Event calendar Drag and Drop Between Calendars Example | Mobiscroll"
component: "Event calendar"
framework: "JavaScript"
library_version: "6.1.5"
url: "https://demo.mobiscroll.com/javascript/eventcalendar/drag-drop-between-calendar-instances"
---

# Drag and Drop Between Calendars - JavaScript Event calendar demo

Drag and drop events between two side-by-side Javascript event calendar in month view — move events across separate calendars with cross-calendar drag and drop. Plain JavaScript API.

- [Live demo](https://demo.mobiscroll.com/javascript/eventcalendar/drag-drop-between-calendar-instances)
- [View code on GitHub](https://github.com/acidb/mobiscroll-demos-javascript/tree/main/src/demos/eventcalendar/calendar-view/drag-drop-between-calendar-instances)
- This demo in other frameworks: [jQuery](https://demo.mobiscroll.com/jquery/eventcalendar/drag-drop-between-calendar-instances.md), [Angular](https://demo.mobiscroll.com/angular/eventcalendar/drag-drop-between-calendar-instances.md), [React](https://demo.mobiscroll.com/react/eventcalendar/drag-drop-between-calendar-instances.md), [Vue](https://demo.mobiscroll.com/vue/eventcalendar/drag-drop-between-calendar-instances.md)

## Description

There are certain cases when moving the events between calendars can come in handy.

Dragging and dropping events between two calendar instances can be enabled by turning on the [`externalDrag`](https://mobiscroll.com/docs/javascript/eventcalendar/api#opt-externalDrag) and [`externalDrop`](https://mobiscroll.com/docs/javascript/eventcalendar/api#opt-externalDrop) options.

## What this demo shows

- Two separate event calendar instances are shown side by side in desktop month view, with `Calendar 1` in the left and `Calendar 2` in the right.
- **Month grid** Day cells display events, each label has a colored line on the left, the event title, and an `end` value that shows the event end time.
- **Event interaction** Hovering over or selecting an event label highlights it.
- **External drag and drop** Events can be dragged from one calendar instance and dropped into the other calendar instance to move them between the two separate calendars.
- **Day cell states** Hovering a day cell highlights the day number with a gray background, while clicking the empty part of the cell selects the day and highlights the day number with a blue background.
- **Calendar header** The header shows the current month and year on the left, and blue month navigation arrows with a `Today` button between them on the right.
- **Gesture navigation** The visible month can also be changed by clicking and dragging the calendar horizontally.

## Best for

- **Multi-calendar planning** Moving events between separate team, department, or location calendars.
- **Resource reassignment** Reassigning appointments, tasks, or shifts from one schedule to another with direct drag and drop.
- **Comparing parallel schedules** Reviewing two month-based schedules side by side and adjusting event placement between them.

## API used in this demo

- [`theme`](https://mobiscroll.com/docs/javascript/eventcalendar/api#opt-theme) - option
- [`themeVariant`](https://mobiscroll.com/docs/javascript/eventcalendar/api#opt-themeVariant) - option
- [`view`](https://mobiscroll.com/docs/javascript/eventcalendar/api#opt-view) - option
- [`height`](https://mobiscroll.com/docs/javascript/eventcalendar/api#opt-height) - option
- [`dragToMove`](https://mobiscroll.com/docs/javascript/eventcalendar/api#opt-dragToMove) - option
- [`eventDelete`](https://mobiscroll.com/docs/javascript/eventcalendar/api#opt-eventDelete) - option
- [`externalDrag`](https://mobiscroll.com/docs/javascript/eventcalendar/api#opt-externalDrag) - option
- [`externalDrop`](https://mobiscroll.com/docs/javascript/eventcalendar/api#opt-externalDrop) - option
- [`data`](https://mobiscroll.com/docs/javascript/eventcalendar/api#opt-data) - option
- [`onEventCreated`](https://mobiscroll.com/docs/javascript/eventcalendar/api#event-onEventCreated) - event

## Code

### JS

```js
mobiscroll.setOptions({
  theme: 'ios',
  themeVariant: 'light'
});

mobiscroll.eventcalendar('#demo-drag-drop-first-calendar', {
  view: {
    calendar: {
      type: 'month',
    },
  },
  height: 550,
  dragToMove: true,
  eventDelete: true,
  externalDrag: true,
  externalDrop: true,
  data: [
    {
      start: '2026-09-18T00:00',
      end: '2026-09-20T00:00',
      title: 'Event 1',
      color: '#e20000',
    },
    {
      start: '2026-09-22T00:00',
      end: '2026-09-24T00:00',
      title: 'Event 2',
      color: '#166f6f',
    },
    {
      start: '2026-09-27T00:00',
      end: '2026-09-28T00:00',
      title: 'Event 3',
      color: '#166f6f',
    },
    {
      start: '2026-10-01T00:00',
      end: '2026-10-03T00:00',
      title: 'Event 4',
      color: '#a32f00',
    },
    {
      start: '2026-10-05T00:00',
      end: '2026-10-07T00:00',
      title: 'Event 5',
      color: '#8b8b00',
    },
    {
      start: '2026-10-11T00:00',
      end: '2026-10-13T00:00',
      title: 'Event 6',
      color: '#1dab2f',
    },
    {
      start: '2026-10-15T00:00',
      end: '2026-10-16T00:00',
      title: 'Event 7',
      color: '#4981d6',
    },
    {
      start: '2026-10-20T00:00',
      end: '2026-10-21T00:00',
      title: 'Event 8',
      color: '#4418d2',
    },
    {
      start: '2026-10-26T00:00',
      end: '2026-10-26T00:00',
      title: 'Event 9',
      color: '#6e7f29',
    },
    {
      start: '2026-11-03T00:00',
      end: '2026-11-04T00:00',
      title: 'Event 10',
      color: '#8b0000',
    },
    {
      start: '2026-11-09T00:00',
      end: '2026-11-10T00:00',
      title: 'Event 11',
      color: '#a32f00',
    },
    {
      start: '2026-11-14T00:00',
      end: '2026-11-16T00:00',
      title: 'Event 12',
      color: '#152d2b',
    },
  ],
  onEventCreated: function (args) {
    if (args.action === 'externalDrop') {
      mobiscroll.toast({
        context: '#demo-drag-drop-first-calendar',
        message: 'Event dropped to Calendar 1',
      });
    }
  },
});

mobiscroll.eventcalendar('#demo-drag-drop-second-calendar', {
  view: {
    calendar: {
      type: 'month',
    },
  },
  height: 550,
  dragToMove: true,
  eventDelete: true,
  externalDrag: true,
  externalDrop: true,
  data: [
    {
      start: '2026-09-20T00:00',
      end: '2026-09-20T00:00',
      title: 'Event 1',
      color: '#',
    },
    {
      start: '2026-09-24T00:00',
      end: '2026-09-26T00:00',
      title: 'Event 2',
      color: '#',
    },
    {
      start: '2026-09-28T00:00',
      end: '2026-09-28T00:00',
      title: 'Event 3',
      color: '#4418d2',
    },
    {
      start: '2026-10-02T00:00',
      end: '2026-10-02T00:00',
      title: 'Event 4',
      color: '#8b1a1a',
    },
    {
      start: '2026-10-06T00:00',
      end: '2026-10-07T00:00',
      title: 'Event 5',
      color: '#e7b300',
    },
    {
      start: '2026-10-12T00:00',
      end: '2026-10-13T00:00',
      title: 'Event 6',
      color: '#a32f00',
    },
    {
      start: '2026-10-17T00:00',
      end: '2026-10-19T00:00',
      title: 'Event 7',
      color: '#21a833',
    },
    {
      start: '2026-10-22T00:00',
      end: '2026-10-22T00:00',
      title: 'Event 8',
      color: '#a917bb',
    },
    {
      start: '2026-10-25T00:00',
      end: '2026-10-27T00:00',
      title: 'Event 9',
      color: '#e20000',
    },
    {
      start: '2026-11-01T00:00',
      end: '2026-11-02T00:00',
      title: 'Event 10',
      color: '#4981d6',
    },
    {
      start: '2026-11-04T00:00',
      end: '2026-11-04T00:00',
      title: 'Event 11',
      color: '#166f6f',
    },
    {
      start: '2026-11-08T00:00',
      end: '2026-11-10T00:00',
      title: 'Event 12',
      color: '#d6d145',
    },
  ],
  onEventCreated: function (args) {
    if (args.action === 'externalDrop') {
      mobiscroll.toast({
        context: '#demo-drag-drop-second-calendar',
        message: 'Event dropped to Calendar 2',
      });
    }
  },
});
```

### HTML

```html
<div class="mbsc-grid mbsc-no-padding md-drag-drop-calendar">
    <div class="mbsc-row">
        <div class="mbsc-col-sm-6 md-drag-drop-calendar-border">
            <div class="mbsc-form-group-title">Calendar 1</div>
            <div id="demo-drag-drop-first-calendar"></div>
        </div>
        <div class="mbsc-col-sm-6">
            <div class="mbsc-form-group-title">Calendar 2</div>
            <div id="demo-drag-drop-second-calendar"></div>
        </div>
    </div>
</div>
```

### CSS

```css
.md-drag-drop-calendar-border {
    border-right: 3px dashed #e4e4e4;
}

.md-drag-drop-calendar .mbsc-form-group-title {
    font-size: 1em;
}

.md-drag-drop-calendar .mbsc-row,
.md-drag-drop-calendar .mbsc-col-sm-6 {
    height: 100%;
}
```

## Implementation notes

- Set `view: { calendar: { type: 'month' } }`. Render two separate `Eventcalendar` instances side by side, each with its own independent events array.
- On both instances, set `externalDrag: true` to allow events to be dragged out and `externalDrop: true` to allow events to be dropped in. Also set `dragToMove: true` to enable dragging within each calendar, and `eventDelete: true` to allow keyboard deletion.
- Handle `onEventCreated` (Vue: `@event-created`) on each instance. Inside the handler, check `args.action === 'externalDrop'` to identify cross-calendar drops and show a `Toast` targeting the receiving calendar's container as `context`.

## Run it in your project

1. If not signed up yet, or don't own a license, you can [start a free trial](https://mobiscroll.com/starttrial).

2. Clone the repository:

   ```
   git clone https://github.com/acidb/mobiscroll-demos-javascript.git
   ```

3. If not installed yet, install the Mobiscroll CLI from NPM:

   ```
   npm install -g @mobiscroll/cli
   ```

4. Config Mobiscroll - open a terminal window in the root directory and run:

   ```
   mobiscroll config javascript
   ```

5. Install dependencies - open a terminal window in the root directory and run:

   ```
   npm install
   ```

6. Run the project:

   ```
   npm run dev
   ```

On a trial, add `--trial` to the config command: `mobiscroll config javascript --trial`.

Running a demo locally requires a Mobiscroll trial or a license; setup is per framework at https://mobiscroll.com/docs/javascript/getting-started/installation

## Related demos

- Previous: [Drag and Drop Permissions](https://demo.mobiscroll.com/javascript/eventcalendar/conditional-move-resize-drag-drop-fixed-event-length-fixed-to-resource.md) - Control move and resize per event or globally in a Javascript event calendar — lock events from moving, prevent resizing, or mix rules by event type or role.
- Next: [Blocked Days and Date Ranges](https://demo.mobiscroll.com/javascript/eventcalendar/blocked-days-ranges.md) - Disable weekends and date ranges in a Javascript event calendar — block dates and drag-and-drop, and choose between strict or permissive validation modes.