i've used a digital alarm clock for awhile, but ive switched to an analog clock. does it know the difference between am and pm? for example, does it know when its 6 in the morning versus 6 at night? i'm setting the alarm on it (it has 3 dials, one for the hour, one for the minute, and a small one for the alarm) but i dont know if its set for the night of for the morning.