Task: I have to reach the office at 9:00 AM after finishing all the household chores, so I will need to wake up early in the morning, so set an alarm for me at 7:00 AM on the Clock app.
Steps:
Open the clock app.
click on the Alarm Icon at the bottom left corner of the screen.
click on the + icon on the screen.
Set the time at 7:00 
click on the AM.
Click on the OK at the bottom right corner of the clock.