Annotations allow you to mark a specific point in time with a vertical line in the Segmentation report
Annotate any metric-impacting events in Mixpanel to help you make sense of the changes in your data.
For example, if you want to create an annotation for July 18, 2016 at 5pm called “This is just a test,” the HTTP request would look like this:
Create annotations programmatically with the Mixpanel HTTP API.
The 'create' method will create a new annotation at a specified time.
US Holidays are automatically annotated and cannot be deleted.