The phrase "end promptly" is correct and usable in written English.
You can use it to describe a situation or event that must end at the designated time. For example: "The meeting was scheduled to end promptly at 5:00pm."
This would be managed by the police and would end promptly at four in the afternoon.
The Interior Department follies will end promptly only if Obama has learned the lessons of the attenuated McChrystal debacle.
The booing, which is slated to begin at 8 P.M. and end promptly at eleven, will give those assembled at the D.N.C. an opportunity to "get it out of their system," the spokesman said.
Anyway, when I answered the phone, the person on the other end promptly announced they were a "debt collector" and so I scoffed and promptly hung up.
We start promptly and end promptly.
Drinking and smoking were forbidden, and the concert ended promptly at the appointed time, 10 30 p.m.
Saturday's meeting ended promptly around noon, allowing ministers to leave before a demonstration in Wroclaw against austerity measures in Europe.
She read a magazine article at her dentist's and came away with the firm convinction that the depression would be ended promptly if people would resume their normal buying habits.
Which, come to think of it, always ends promptly at 9 p.m. How do they do it, while the commercial networks let Oscar and Emmy and Grammy telecasts ramble on into Letterman-Leno territory?
He says this depression will kill him if it doesn't end… She read a magazine article at her dentist's and came away with the firm convinction that the depression would be ended promptly if people would… He was one of the smart ones who got out of the market in August, 1929.
He says this depression will kill him if it doesn't end… She read a magazine article at her dentist's and came away with the firm convinction that the depression would be ended promptly if people would… Her husband lost his job last summer, but found another position paying about a third as much as he received before.
