Notion tasks to Google Calendar events in n8n

Trigger

Schedule Trigger, every 15 minutes

Nodes

9

Requires

Notion, Google Calendar

Category

Sync

From the course

Notion, Airtable and Google Workspace

Published

2026-09-10

What it does

Node by node

1. 1

   Schedule Trigger Fires every 15 minutes and feeds both branches at once.

2. 2

   Tasks needing an event Queries the Notion database for pages where Due Date is not empty AND Status does not equal Done AND Calendar Event ID is empty. Returns all matches.

3. 3

   Loop Over Items Batch size one, so each task is claimed and created individually rather than as a bulk write.

4. 4

   Claim the task Writes pending:{{ $execution.id }} into the Calendar Event ID property before any calendar call. That single write is what stops a slow run and the next scheduled run from both creating an event for the same task.

5. 5

   Create calendar event Creates an event on the chosen calendar with allday yes, summary taken from the page title property, start set to the Due Date start value and end set to that date plus one day.

6. 6

   Write event ID back Overwrites the pending marker on the Notion page with the real Google Calendar event id, then returns to the loop.

7. 7

   Completed tasks with an event The other branch. Queries Notion for pages where Status equals Done AND Calendar Event ID is not empty AND does not contain pending:, so half-finished claims are never treated as real events.

8. 8

   Delete calendar event Deletes the event whose id is stored on the page. onError is set to continue on the regular output, so an event a person already deleted by hand does not fail the run.

9. 9

   Clear event ID Empties the Calendar Event ID property on the Notion page so the record is clean.

Setup after import

1. 1

   Create a Notion internal integration credential and select it on all five Notion nodes, then share the task database with that integration.

2. 2

   Create a Google Calendar OAuth2 credential and select it on both Google Calendar nodes.

3. 3

   Replace REPLACE_WITH_YOUR_CALENDAR_ID on both Google Calendar nodes with the calendar you want the events on.

4. 4

   Replace the Notion database URL on both query nodes. The export ships with https://www.notion.so/YOUR_NOTION_DATABASE_ID?v=YOUR_VIEW_ID.

5. 5

   Add three properties to the Notion database with these exact names: Due Date (date), Status (status, with a Done option) and Calendar Event ID (rich text). The filters reference the names literally.

Limits

• Title and due date only. No description, no time of day, no attendees: every event is all day.

• A due date changed after the event exists does not move the event.

• Nothing reads Google Calendar back into Notion.

• If a run fails between Claim the task and Write event ID back, the page keeps its pending: marker and is excluded from both branches until someone clears it.

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