How to change the default notification settings for a particular calendar

To change your default notification settings, follow these steps:

1. Under the  ‘My Calendars’ link on the left, click the down arrow button next to the appropriate calendar, then select ‘Notifications’. (Alternatively, click ‘Settings’ at the bottom of the calendar list, then click the appropriate ‘Notifications’ link.)
   
   
2. In the ‘Event reminders’ section, select the method and corresponding reminder time from the drop-down menu. If you would like to add additional default reminders, simply click ‘Add a reminder’.
   
   
3. Once you have made the appropriate changes to your default settings, click ‘Save’. Please note that when you make changes to the reminder settings for events on your calendar, the changes will only apply to you. Invited guests or those who have access to the events will receive reminders according to their own Google Calendar reminder settings.