Tic Toc

I scream in the morning, but only to help you. If I didn't, then you would never be on time. I guess you could say I have a pretty important job, and I could never sleep in, unless you snooze me. My two hands point to a special number and then I scream. That is when I know you have somewhere to be. Usually if it is a good thing, like Christmas morning, you smile at me but if it is somewhere you don't want to go, like school, you would look at me with hatred. Even though sometimes I get the stink eye from you and you don't really thank me all that much, I still like to help you out. I keep you on a schedule, and without me you would probably be lost. I don't want you to loose track.

*Side question* Can anyone guess what this word is??
There is a word. Six letters it contains. Take one away and twelve is what remains.