at (some time) sharp

At an exact time, with the emphasis that one must not be late. We need to leave for the airport at 8 AM sharp tomorrow morning. Please be here at 6:30 sharp.

Common Names:

Name	Pronounced	Usage
Murtaza	-	Arabic
Leroy	LEE-roi	English
Mikel	-	Basque
Jaylen	JAY-lən (American), JAY-lin (English)	African American (Modern), English (Modern)
Shafaqat	-	Arabic
Ofek	-	Hebrew