Create your follow-up reminder from a previous diary entry
From the diary, select the contact entry and click the View/Edit Contact action OR right-click the contact entry and select Open Contact from the drop-down menu
Click the Remind Me in 1, 2 or 3 Months action
A message will appear at the bottom of the contact record to let you know the reminder has been created.
The reminder will be added to your diary on the requested day.
Hover over the diary entry to see the reminder details.
It can also be seen on the task list which can be accessed from Activities, Tasks on the main menu.