Integrate your calendar:

https://s3-us-west-2.amazonaws.com/secure.notion-static.com/9c62291c-7566-437a-b870-43a818186310/01.gif

Events from your integrated calendar will be shown in the timeline:

https://s3-us-west-2.amazonaws.com/secure.notion-static.com/032e7a1f-b7a0-4352-ab98-54bb8ef4d07b/02.gif