The extension Reminder allows users to keep track of pages by creating reminders for a particular date. By default, the wiki sends out a notification one week before and on the day that was set in the reminder.
The Special:Reminder page is available to wiki administrators. It displays a list of all reminders for all sites and all users. Wiki admins can delete reminders here or edit the due date and other details. Users in the admin role can theoretically create reminders for other users. This ability should be used with caution, however, as users may not expect others to create reminders on their behalf.
Notifications
By default, users receive a notification in the wiki and via email 6 days before and on the due date. This behavior can be customized in the user preferences.