The time between daylight and darkness when blood drinkers like to come out. What am I?

Answer: Twilight

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More What am I ?

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There are four of us, but it seems like everyone loves spades the most. What am I?
There are two meanings to me. With one I may need to be broken, with the other I hold on. My favorite characteristic is my charming dimple. What am I?
There’s no reason to fear If you see me lurking here Even though I shouldn’t exist But few might have missed That I’m not at all real Because nothing can conceal The fact that I’m something That’s not at all living What am I?
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Though learning has fed me, I know not a letter; I live among the books, Yet am never the better. What am I?
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Three or four, I can stab through or rule the seas. You know my cousins. What am I?
Tick, Tock, the clicks of a clock, moments pass as it never stops. One moment one, one moment ten, moments rush until I initiate the end. What am I?