While a student, he lost his father and had to work around the clock to be able to support himself.

"We're working around the clock here to help him out and that's the best he can do?"

I've been working around the clock for the past couple of days.

"We have already started working around the clock on care and treatment," she added.

They have worked around the clock to care for you.

Doctors and medical students have been working around the clock.

Everyone was working around the clock to get these things done.

"He has worked around the clock to bring about this meeting."

They're working around the clock, and have been since we brought them up here three years ago.

For the past 4 days, they've been working around the clock and through the night.