surya90 
Not only you, sure 100% users don't need and don't want this clock. 
Very comlicated to insert any value, example 10h30 AM.
- Click to Popup the clock
 
- Click 10
 
- Click AM
 
- Cick OK
 
- Click 6
 
- Click AM
 
- Click OK
 
And that's just the opening hour, continue the same loop with closing time....
Don't know why this clock is still there?