Using Google Calendar & Notion API to Sync Events/Tasks – Zapier Automations

Syncing Google Calendar events with a Notion “master task” database is now practical enough to run as a real workflow—if the setup treats Google Calendar as the system of record for scheduled items. The core move is adding two Notion properties (a Google Calendar URL link and an end/completion time field) and then building three Zapier automations that handle the full lifecycle: creating new events in Notion when something is added to Google Calendar, updating the matching Notion record when the Google Calendar event changes, and marking items as done (effectively removing them from active views) when a Google Calendar event is deleted.

The approach is tailored to a PPV-style action items database where only “scheduled” tasks have specific times. Those scheduled entries are the only ones synced, preventing priority-based tasks (like non-timed work) from being accidentally overwritten. The Notion database needs a URL-type property to store the Google Calendar entry link so each Notion page can jump back to the exact calendar item. It also needs an end time: Notion’s “completion date” is repurposed for scheduled items as an end time because Google Calendar requires both start and end times for event updates.

Once the database is ready, Zapier becomes the bridge between Google Calendar and Notion via a Notion integration (created through Notion’s “develop your own integrations” flow). The automations are built around Google Calendar triggers, with Notion actions as the effect. First comes a “new event” trigger: when a Google Calendar event is created (including ones added automatically by tools like Zoom or Calendly), Zapier creates a new item in the Notion action items database. The mapping is explicit: Google Calendar event title becomes the Notion title, event start becomes the Notion due/start time, event end becomes the Notion end/completion time, and the Google Calendar HTML link is stored in the new URL property. The automation also assigns fixed PPV-style attributes—setting status to “active,” owner as needed, and priority to “scheduled”—so the item immediately appears in the right filtered views.

Second comes an “updated event” trigger. Because Zapier needs to edit the correct Notion page, the workflow includes an intermediary Notion step that searches the action items database by the stored Google Calendar HTML link. After it finds the matching record, Zapier updates the Notion title and the start/end times. A key limitation appears here: changes to the Google Calendar description do not reliably transfer into Notion in testing, so the description mapping is left empty for updates.

Third comes an “event cancelled” trigger. Since Zapier lacks a direct “delete database item” action in this setup, the workaround is to set Notion’s “done” checkbox to true when a Google Calendar event is deleted. That removes the item from active filtered views, though it will still show up in historical reviews.

A crucial workflow decision closes the loop: creating and managing scheduled events in Google Calendar is recommended. Creating in Notion and pushing to Google Calendar can work, but it produces an “orphaned” Notion record that lacks the Google Calendar link, making later edits or cancellations from Google Calendar impossible to sync. Committing to Google Calendar for create/update/delete yields consistent two-way synchronization for scheduled items, while keeping the PPV task system clean and accurate.