so we could say ' I go to bed at 7 o'clock PM '. We can tell the time without saying AM and PM though - for this, we use the 24 hour clock. The 24 hour clock always uses 4 digits, and we use this ...

For example, 1:00 AM is written as 0100 hours, while 1:00 PM is written as 1300 hours. Also called the "24-clock," the format is commonly used in industries and professions worldwide in which 24 ...

In decades past, we’d wake up to clocks running an hour behind or ahead, and we’d adjust them by hand to fit the new time. These days, the clocks we use most often (like those on our phones ...

so we could say ' I go to bed at 7 o'clock PM '. We can tell the time without saying AM and PM though - for this, we use the 24 hour clock. The 24 hour clock always uses 4 digits, and we use this ...