Question: What do thief's get for stealing calendars?

Question: What starts with an e but only has a single letter in it?

Question: What can one not keep, two hold, and three destroy?

Question: Who was buried in Grant's Tomb?

Question: In spring I look gay, Covered in a green array, The warmer it gets the more clothing I wear, As the cold grows, I throw away my clothes.

What am I?