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12-hour clock

12-hour clock

The 12-hour clock is a time convention in which the 24 hours of the day are divided into two periods: a.m. and p.m. Each period consists of 12 hours numbered: 12, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 and 11. The 12-hour clock has been developed since the... Wikipedia