Keep Google Calendar in sync when Notion dates change
You push a deadline in Notion but the old time still sits on your calendar, quietly wrong. Notis catches the property change and patches the existing Google Calendar event, so the two views agree without you touching either one twice.
Trigger
Page Properties Updated
Triggers when properties of a Notion page are updated. Customer optionally scopes with at most one of: - data_source_id: any row in this data source - page_id: this specific page - parent_page_id: any page whose immediate parent is this page With none set, fires for any property change in the workspace the integration has access to. Adding a column to a data source fires this trigger once per existing row. Customers can branch on `data.updated_properties` (array of property IDs) to filter downstream.
Action
Patch Event
Updates specified fields of an existing event in a google calendar using patch semantics (array fields like `attendees` are fully replaced if provided); ensure the `calendar id` and `event id` are valid and the user has write access to the calendar.
Why this helps
Changing a date in Notion leaves a stale calendar event behind, and the mismatch causes double bookings and missed context.
- Your calendar reflects the real plan the moment you shift a date
- No stale events left behind after you reschedule in Notion
- Patch semantics mean only the time changes, invites stay intact
- One edit instead of updating two tools by hand
Setup
Build it in a few focused steps.
- 1Connect Notion and Google Calendar to Notis from the portal if you have not already.
- 2Open Automations in your portal and click New Automation, or just tell Notis what you want in chat.
- 3Describe the outcome: when a task's date changes in my Notion database, update the matching Google Calendar event to the new time.
- 4Select the Page Properties Updated trigger and pick where Notis should report each run.
- 5Test by moving one task's date in Notion and checking that the calendar event follows.
Questions about this workflow
How does Notis know which event to update?
Notis matches the Notion item to the event it created earlier. You describe the link in plain language and it handles the lookup.
Will attendees get re-invited?
Patch updates only the fields that changed, so existing invites and details stay in place unless your prompt asks otherwise.
What if I change the status instead of the date?
You can scope the prompt to react only to date changes, or handle status changes with a separate automation.
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Supported Triggers and Actions
Notis builds workflows that link Notion to Google Calendar. A trigger fires from one place; an action lands in another.
Notion triggers
Google Calendar actions
All Page Events
Triggers when any Notion page is created or updated across the workspace.
Insert Calendar into List
Inserts an existing calendar into the user's calendar list.
Comment Created
Triggers when a new comment is created in Notion. Optional `page_id` filter scopes to comments on a specific page. When omitted, fires for any new comment in the workspace the integration has access to. Requires the 'Read comments' capability on the Notion integration. If a connection was authorized before that capability was enabled, the user must re-authorize the connection for comment events to flow.
Update Calendar List Entry
Updates an existing entry on the user\'s calendar list.
New Comment
Triggers when a new comment is added to a specified Notion block or page.
Delete Calendar
Deletes a secondary calendar. use calendars.clear for clearing all events on primary calendars.
Database Created
Triggers when a new Notion database (the container) is created. A database is the post-2025-09-03 container that holds one or more data sources. This trigger fires for the container's creation event (`database.created`), distinct from `NOTION_DATASOURCE_CREATED` which fires when a new data source is added to an existing database. Most customers calling Notion's `POST /v1/databases` (the legacy API) or creating a database via the Notion UI will see this event. Adding a new data source to an existing database fires `data_source.created` instead — use `NOTION_DATASOURCE_CREATED` for that. Notion's payload puts `entity.type: "block"` (the container is a `child_database` block in the content tree) and `entity.id` is the database id.
Update Calendar
Updates metadata for a calendar.
Data Source Created
Triggers when a new Notion data source is created. Fires workspace-wide. The payload's `data.parent` carries the data source's tree parent (typically the teamspace) for downstream filtering. A single template-based database creation can fire multiple `data_source.created` events at once — one per data source the template instantiates.
Clear Calendar
Clears a primary calendar. this operation deletes all events associated with the primary calendar of an account.
Data Source Schema Updated
Triggers when a Notion data source's schema is updated. Fires on column add / remove / rename. Payload includes `data.updated_properties: [{id, name, action}]` so consumers can discriminate the kind of change downstream. Optional `data_source_id` filter scopes to schema changes on a single data source. When omitted, fires for any schema change in the workspace the integration has access to. Note: adding a column also fires `page.properties_updated` once per existing row in the data source. Customers wanting a single structural-change signal should use this trigger.
Create Event
Creates an event on a google calendar, needing rfc3339 utc start/end times (end after start) and write access to the calendar. by default, adds the organizer as an attendee unless exclude organizer is set to true.
New Page
Triggers when a new page is added to a Notion database.
Delete event
Deletes a specified event by `event id` from a google calendar (`calendar id`); this action is idempotent and raises a 404 error if the event is not found.
Page Added to Page
Fires when a new subpage (a `child_page` type block) is added under a specified parent Notion page.
Create a calendar
Creates a new, empty google calendar with the specified title (summary).
Connect any two apps with Notis in the middle.
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