Currently Being ModeratedSep 13, 2013 11:54 AM (in response to medicinemanKE)
In the Calendar menu, select Preferences.
In the Preferences dialog, selet the Alerts tab.
You can then (optionally) select which calendar Account you want to change the settings for (i.e., iCloud, or Gmail, etc.). Choose the default Events time, and separately, when to be identified for upcoming All Day Events.