Set reminders and the app will notify you with notifications.
Other than reminders generated automatically from to-dos and habit (if you’ve already set the time for the to-dos and habit’s slots), you can also set reminders for many things from an entry, note, note’s item,...
From a timeline, long press an entry/note -> Set reminder
From a list note, long press a note item -> reminder
You can view past and upcoming reminders from the main screen -> left panel -> Reminders
Journal it! will notify you when you have entries from the same day months, or years before.
You can enable/disable a specific type of notification from Settings -> scroll down to Notifications section.