Custom Event Reminders on Calendar

Custom Event Reminders on Calendar

I'm trying to create organization wide events on the calendar of events that we should keep in mind over the course of the year to target, however the event reminders are limited to a maximum lead time of 2 days. We need to start selling for these events between 1 and 2 months in advance and I would like my employees to be notified when they should start contacting Leads and Contacts related to these events.

How can I create a custom reminder to notify us 1 to 2 months in advance of the event?

Thanks!