I couldn't go to work yesterday because I had the 24-hour flu.

For international travelers, many airports use 24-hour clocks on their departure boards to prevent misunderstandings.

We will lose an hour of sleep when we set the clocks forward for daylight saving time on Sunday.

When everything seemed lost, she reminded herself that the darkest hour is just before the dawn and kept going.

When morale was low, their mentor reminded the class of the proverb the darkest hour is always just before the dawn to encourage everyone to persevere.

The hourslong power outage left the neighborhood in darkness and frustration.

They archived hoursful of interviews to preserve the community's oral history.

The experiment measured an hoursworth of oxygen produced by the algae culture.