Best alarm clock for heavy sleepers: Sunrise, smart and soundless options to get you up and at 'em
so no fiddling about when the clocks change, and your wake-up alarm can be set to radio instead of a repetitive noise, ...
BBC3y
12-hour and 24-hour clocks
It is a 12-hour clock. The first 12 hours of the day, from midnight to midday, are called am. The next 12 hours, from midday to midnight, are called pm. However, you can tell the time without ...