12hours

12hours refers to the duration of twelve hours, equivalent to 720 minutes or 43,200 seconds. As a unit of time, it represents half of a standard day in the 24-hour cycle and is commonly used when describing half-day periods or schedules.

In timekeeping, many clocks and timetables utilize a 12-hour cycle, dividing the day into two periods labeled AM and PM. This system contrasts with the 24-hour clock, where hours run from 00 to 23 without a meridian split. The 12-hour convention is particularly common in English-speaking countries and in contexts where a more intuitive day-night partition is preferred.

Practical uses of a 12-hour period include planning work shifts, travel itineraries, and events that last approximately half a day. It also appears in survey windows, data reporting windows, and other scheduling scenarios where a half-day granularity is adequate.

Some cultural and linguistic contexts discuss twelve hours as a natural half-day unit, often paired with phrases like "the first twelve hours" or "the next twelve hours" to mark progression through a day or a period of activity.

See also: half-day, 12-hour clock, AM and PM, timekeeping, hours, day.