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
Bharat	-	Indian, Hindi, Marathi
Mcmullen	[mək'mʌlin]
Finn (2)	FIN (Danish)	Danish, Norwegian, Swedish
Jane	JAYN	English
Patrice (2)	-	English
Eevi	E:-vee	Finnish