Publishes a Notion database with a date property to a calendar feed.

Try the live demo calendar feed:

https://ncal.val.run/2d92c190bff080658109ec63757a2e53?tz=America/Los_Angeles

Your database needs these properties:

• Name (title) - The event title
• Date (date) - The event date/time
• Done (checkbox) - Whether the task is complete

You can duplicate this example database to get started: 👉 Example Todo Database

1. Go to Notion Integrations
2. Click "New integration" and give it a name
3. Copy the "Internal Integration Secret" (this is your API token)

1. Open your Notion database
2. Click ••• from the top right → Connections → Connect to
3. Select the integration you created

1. Fork this val
2. Set NOTION_API_TOKEN in "Environment variables" from the sidebar
3. Update datePropertyName, donePropertyName, and maxEventAgeInMonths in the code if your property names differ

Access your calendar feed by appending your Notion database ID and timezone to the URL:

https://<your-val-url>/<notion-database-id>?tz=<timezone>

For example:

https://example.web.val.run/abc123def456?tz=America/Los_Angeles

You can find your database ID in the Notion URL when viewing the database: https://notion.so/<database-id>?v=...

The tz parameter uses IANA timezone names (also known as "tz database" names).

Common examples:

• America/New_York (Eastern Time)
• America/Chicago (Central Time)
• America/Denver (Mountain Time)
• America/Los_Angeles (Pacific Time)
• Europe/London
• Europe/Paris
• Asia/Tokyo
• Asia/Shanghai
• Australia/Sydney

Find your timezone name in the full list: List of tz database time zones (Wikipedia)

Look for the "TZ identifier" column in the table.

If you don't specify a timezone, it defaults to UTC.

Subscribe to this URL in any calendar app (Google Calendar, Apple Calendar, Outlook, etc.) to sync your Notion events.

Events in Notion that have only a date (no time) are displayed as all-day events in your calendar.

The calendar automatically creates a daily reminder for overdue tasks. An event is considered overdue if:

• The Done checkbox is unchecked, AND
• Either the date is missing OR the end date is in the past

All overdue events are aggregated into a single all-day event that appears on today's date (based on your specified timezone) with:

• Title: All overdue event titles joined with " • " (e.g., "Task 1 • Task 2 • Task 3")

• Description: Each event's title and Notion URL, formatted as:

  Task 1
  https://notion.so/...
  
  Task 2
  https://notion.so/...
  

This gives you a daily overview of incomplete tasks that need attention.

Your Notion database should have:

• A Name title property for event titles
• A Date date property (configurable via datePropertyName)
• A Done checkbox property (configurable via donePropertyName)

👉 Duplicate this example database to get started quickly.