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
Anabelle	AN-ə-bel	English (Modern)
Calla	KAL-ə	English
Pancrazio	pahn-KRAH-tsyo	Italian
Ivar	EE-vahr (Swedish, Norwegian)	Swedish, Norwegian, Danish
Jed	[dʒed]
Constance	['kɔnstəns]