Is there functionality with in Adobe Analytics to log annotations? Specifically creating an annotation and having it show somehow as a warning on charts showing over time. Have a few instances where this would be critical for historic records.
Are you trying to use calendar event in workspace or Report and Analytics(R&A)?
Calendar events cannot be used within workspace as of now.
If a user would like to access a calendar event, they would need to follow the path below: Login to Analytics >> Components >> Calendar Events >> Search for the calendar event you would like to use >> Check the check box for "On Report".
Once user checks the "On Report" for a calendar event, that event will be visible on the Site metric reports which has the graph with dates.