Sometimes you need to be reminded of things. Usually its something that requires a daily or predestined amount of time. However, that leaves out the reminders that require only the occasional notice. For those frustrated by this lack of notification, Google’s taken notice. At some point, the search giant added the ability for Google Now to occasionally remind us of an event.
For those setting reminders, you should see an occasional option. Once set the reminder will show up at the top of your Google Now cards. You’re then able to dismiss/postpone the notice for another date, however the specific interval the company uses is still a mystery. Even so, you folks should see the option in Google Now.
source: Android Police