Customize To-Do notification date and times.

Currently to-do notifications will look two days in advance for to-dos due soon. But  we would like to customize the notification date and times because two days in advance is too short for us to get notifications.  (For example, we want to get notification 3 times(2week, 1 week , 3days in advance).)
I think the notification date and times users want to get is different in individual.