Google Calendar Alarm reminders with snooze function, an alarm clock for Google Calendar Events. 

Calendar Alarm Clock automatically imports all (Google) calendar events and you can choose which appointments you want to be reminded of in the "Calendar Alarm Clock Overview". 
 
To be reminded of an event in advance, you can create notifications for your Google Calendar events, which will also trigger an alarm as a reminder.

Each notification triggers an alarm clock that only stops when you snooze it or turn it off. It reliably serves as a reminder if you need more than a small notification before one of your Events or Appointments starts.

The calendar alarm clock can be modified individually (Snooze button size, Alarm Sound, Vibration, Alarm Duration and more!)

Don't miss your Calendar Events ever again!

Calendar Alarm Reminder - the ultimate calendar reminder and alarm app!