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
Cateline	-	Medieval French
Ashley	['æʃli]
Kristia	-	English (Rare)
Mcmullen	[mək'mʌlin]
Luca (2)	LOO-tsah (Croatian)	Hungarian, Croatian
Joses	JO-seez (English)	Biblical