How to change the frequency of notifications

You can change notifications from your profile (1).
From the My Profile popup, click on Email notifications (2), and then you can modify the frequency for a given notification category.
There are a couple of options to select from (3):
A) repeat notification – multiple notifications sent from a given day until the event occurs;
B) single notification– notification sent on a specific day;
C) multiple days – this option defines multiple days (when separated by a comma).

The below example shows how to set up notification for staff anniversaries with 3 different intervals: month (e.g., 30 days), week, and day notice.