I can cycle many hours but I don’t get tired even at the end of the day. What am I?

Answer: A clock

More What am I ? with answers

More What am I ?

I can fall off a building and live, but in water I will die. What am I?
I can fall off a building and live, but put me in water I will die. What am I?
I can fill a house or fill your mouth but you can never catch me in your hands. What am I?
I can fill a room but take up no space. Look out at night, and I am in no place. What am I?
I can fill any space, float, and disappear. Never touching the ground I help others get around. What am I?
I can fly but have no wings. I can cry but I have no eyes. Wherever I go, darkness follows me. What am I?
I can fly but I am not a bird, I am colorful but I am not a rainbow, I am beautiful and social but I am not a person. What am I?
I can generate fear and some say I come out of your ears. I am as quiet as a mouse but not welcomed in the house. What am I?
I can generate fear and some say I come out of your ears. I am as quite as a mouse but not welcomed in the house. What am I?
I can have any and all colors that exist, and yet I show none. My size and strength are immeasurably immense, and yet I am invisible to the naked eye. What am I?
I can help you to mend. I hide my body but never my head. What am I?
I can honk without using a horn. What am I?