Adjust alarms:
To control general alarm settings, like alarm volume and snooze duration, touch
> Settings.
If you've set up Voice Match, say “OK, Google”. Or, touch
on the Google Search widget.

When prompted to speak, say your command. For example: “Set alarm for 7:45 p.m., label, switch the laundry” or “Wake me up at 7 a.m. tomorrow.”
Your phone sets the alarm and provides a confirmation.
You'll see
in the status bar and on your lock screen.
To adjust it, open quick settings and touch the alarm time.