In many countries, train schedules are displayed using the 24-hour clock to avoid confusion between morning and evening departures.

Traders braced themselves for the triple witching hour, when volume and volatility often spike as three types of derivatives contracts expire simultaneously.

The technician inspected the old watt-hour meter before replacing it with a digital model.

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.

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

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

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