Default Alarm Snooze Times
You can set up one snooze time for all your alarms.
To set up a default snooze time
From the application-level menu, choose Tools, then User Preferences.
The User Preferences screen appears.
On the link bar, click Calendar.
The Calendar screen appears.
From the drop-down lists for the Snooze Period field, select a time between 15 and 120 minutes.
Instead of minutes, you can select hours, days, and weeks. The time that you select is the time interval before alarms trigger a second time after postponing them.